Geologic map of central (interior) Alaska: Digital data

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What does this data set describe?

Title: Geologic map of central (interior) Alaska: Digital data
Abstract:
This coverage represents a compilation of reconnaisance geologic mapping of the Anchorage quadrangle, Alaska.
  1. How might this data set be cited?
    U.S. Geological Survey, 1998, Geologic map of central (interior) Alaska: Digital data: U.S. Geological Survey Open-File Report 98-133a.

    Online Links:

    This is part of the following larger work.

    Wilson, F.H. (comp.), Dover, J.D. (comp.), Bradley, D.C. (comp.), Weber, F.R. (comp.), Bundtzen, T.K. (comp.), and Haeussler, P.J. (comp.), 1998, Geologic map of Central (Interior) Alaska: U.S. Geological Survey Open-File Report 98-133.

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -150.0
    East_Bounding_Coordinate: -147.0
    North_Bounding_Coordinate: 62.0
    South_Bounding_Coordinate: 61.0
  3. What does it look like?
    http://pubs.usgs.gov/of/1998/of98-133-a/minimap.gif (GIF)
    Reduced image (480x355 pixels) of the printed map produced from these data.
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1998
    Currentness_Reference:
    publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: map
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set.
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 6
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -147.0
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000.0
      False_Northing: 0.0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 300
      Ordinates (y-coordinates) are specified to the nearest 300
      Planar coordinates are specified in meters
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.9787.
  7. How does the data set describe geographic features?
    cover.AAT
    Lines of geologic significance
    ARC-CODE
    Arc-code is a positive integer value (3 3 I) item in the arc attribute table, indicating the type of arc. Line types of geologic significance include stratigraphic contacts, faults, shorelines, ice contacts, lineaments, and alteration boundaries. Line types representing stratigraphic contacts and faults are coded differently depending on the confidence with which their characteristics are known: certain, approximate, or queried.
    ValueDefinition
    0Hidden lines
    1Stratigraphic contact, certain
    2Stratigraphic contact, approximate
    3Stratigraphic contact, inferred, queried
    4Normal fault, certain, digitized with upthrown side on the right (code of 1 added to ARC-PARA1 where U/D is designated in source)
    5Normal fault, approximate, digitized with upthrown side on the right (code of 1 added to ARC-PARA1 where U/D is designated in source)
    6Normal fault, inferred, queried, digitized with upthrown side on the right (code of 1 added to ARC-PARA1 where U/D is designated in source)
    7Shoreline or riverbank
    9Boundary of altered zone or hornfels
    10Thrust fault, certain, teeth on right from origin (angle of thrusting added to ARC-PARA1 where designated in source)
    11Thrust fault, approx., teeth on right from origin (angle of thrusting added to ARC-PARA1 where designated in source)
    12Thrust fault, inferred, queried, teeth on right from origin (angle of thrusting added to ARC-PARA1 where designated in source)
    13Moraine or till margin (scour) on bedrock
    14Caldera or crater rim
    15Ice contact (glacier limit)
    16Thrust fault, having left lateral oblique slip (angle of thrusting added to ARC-PARA1 where designated in source)
    17Thrust fault, having right lateral oblique slip (angle of thrusting added to ARC-PARA1 where designated in source)
    18Internal contact
    19Internal contact having tics on right from origin
    21Syncline, certain, digitized in direction of plunge
    22Syncline, approx., digitized in direction of plunge
    23Syncline, inferred, queried, digitized in direction of plunge
    24Anticline, certain, digitized in direction of plunge
    25Anticline, approx., digitized in direction of plunge
    26Anticline, inferred, queried, digitized in direction of plunge
    30Fault, unknown offset, certain location
    31Fault, unknown offset, approximate location
    32Fault, unknown offset, inferred location
    35High-angle reverse fault, certain, teeth on right from origin (angle of thrusting added to ARC-PARA1 where designated in source)
    36High-angle reverse fault, approximate location, teeth on right from origin (angle of thrusting added to ARC-PARA1 where designated in source)
    37High-angle reverse fault, inferred location, teeth on right from origin (angle of thrusting added to ARC-PARA1 where designated in source)
    41Syncline, overturned, certain, digitized in direction of plunge.
    42Syncline, overturned, approx., digitized in direction of plunge.
    43Syncline, overturned, inferred, queried, digitized in direction of plunge.
    44Anticline, overturned, certain, digitized in direction of plunge.
    45Anticline, overturned, approx., digitized in direction of plunge.
    46Anticline, overturned, inferred, queried, digitized in direction of plunge.
    50Dikes and sills, drawn in heavy red line.
    51Concealed contact
    52Concealed normal fault
    53Concealed thrust fault
    54Concealed high-angle reverse fault
    55Concealed normal fault, having right lateral oblique slip.
    56Concealed normal fault, having left lateral oblique slip.
    57Concealed right lateral fault
    58Concealed left lateral fault
    61Syncline, certain, no plunge.
    62Syncline, approx., no plunge.
    63Syncline, inferred, queried, no plunge.
    64Anticline, certain, no plunge.
    65Anticline, approx., no plunge.
    66Anticline, inferred, queried, no plunge.
    71Normal fault, certain, having right lateral oblique slip.
    72Normal fault, approx., having right lateral oblique slip.
    73Normal fault, certain, having left lateral oblique slip.
    74Normal fault, approx., having left lateral oblique slip.
    75Normal fault, inferred, queried, having left lateral oblique slip.
    76Normal fault, inferred, queried, having right lateral oblique slip.
    77Fault, certain, having no known movement.
    78Fault, inferred, queried, having no known movement.
    79Fault, approx., having no known movement.
    81Syncline, overturned, certain, no plunge.
    82Syncline, overturned, approx., no plunge.
    83Syncline, overturned, inferred, queried, no plunge.
    84Anticline, overturned, certain, no plunge.
    85Anticline, overturned, approx., no plunge.
    86Anticline, overturned, inferred, queried, no plunge.
    87Right lateral fault, certain
    88Right lateral fault, approximate
    89Right lateral fault, inferred, queried.
    90Left lateral fault, certain.
    91Left lateral fault, approximate.
    92Left lateral fault, inferred, queried
    93Lineament
    94Shear zone, certain
    95Shear zone, approximate
    96Shear zone, inferred
    99Bounding line (neatline) of coverage"
    ARC-PARA1
    Integer code used to aid symbolization of the arc, indicating characteristics of faults. Where the line indicates a thrust or high-angle reverse fault, the value is the dip of the fault plane, if known, 0 if not. Negative values indicate that the fault is overturned.
    ValueDefinition
    1Where the arc is a normal fault, this indicates the upthrown side is known and was indicated on the source map.
    Range of values
    Minimum:-89
    Maximum:90
    Units:degrees
    Resolution:1
    SOURCE
    Publication from which the base data for this feature were obtained. The values are short character strings consisting of a two-letter abbreviation for the quadrangle name and a 3-digit sequence number for the source.
    ValueDefinition
    AN1Winkler, G.R., compiler, 1992, Geologic map and summary geochronology of the Anchorage 1° x 3° quadrangle, southern Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-2283,, scale 1:250,000.
    BD1Weber, F.R., Foster, H.L., Keith, T.E.C., and Dusel-Bacon, Cynthia, 1978, Preliminary geologic map of the Big Delta quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-529A, scale 1:250,000.
    BDCI1Smith, T.E., Robinson, M.S., Weber, F.R., Waythomas, C.W., and Reifenstuhl, R.R., 1994, Geologic map of the Upper Chena River area, eastern interior Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 115, scale 1:63,360, 19 p.
    CI1Foster, H.L., Laird, Jo, Keith, T.E.C., Cushing, G.W., and Menzie, D.W., 1983, Preliminary geologic map of the Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report, 83-170-A, scale 1:250,000.
    CI2Wiltse, M.A., Reger, R.D., Newberry, R.J., Pessel, G.H., Pinney, D.S., Robinson, M.S., and Solie, D.N., 1995, Geologic map of the Circle Mining District, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 95-2a, scale 1:63,360.
    CI3Weber, F.R, Unpublished mapping, 1997, scale 1:250,000.
    BDCI1Smith, T.E., Robinson, M.S., Weber, F.R., Waythomas, C.W., and Reifenstuhl, R.R., 1994, Geologic map of the Upper Chena River area, eastern interior Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 115, scale 1:63,360, 19 p.
    FMD1Robinson, M.S., Smith, T.E., and Metz, P.A., 1990, Bedrock geology of the Fairbanks Mining District: Alaska Division of Geological and Geophysical Surveys Professional Report 106, scale 1:63,360.
    FMD1Newberry, R.J., Bundtzen, T.K, Clautice, K.H., Combellick, R.A., Douglas, T., Laird, G.M., Liss, S.A., Pinney, D.S., Reifenstuhl, R.R., and Solie, D.N., 1996, Preliminary geologic map of the Fairbanks Mining District, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 96-16, scale 1:63,360.
    FB1Pewe, T.L., Wahrhaftig, C., and Weber, F., 1966, Geologic map of the Fairbanks quadrangle, Alaska: U.S. Geological Survey, Miscellaneous Investigations I-455, scale 1:250,000, 5 p.
    FMD1Newberry, R.J., Bundtzen, T.K, Clautice, K.H., Combellick, R.A., Douglas, T., Laird, G.M., Liss, S.A., Pinney, D.S., Reifenstuhl, R.R., and Solie, D.N., 1996, Preliminary geologic map of the Fairbanks Mining District, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 96-16, scale 1:63,360.
    FMD1Robinson, M.S., Smith, T.E., and Metz, P.A., 1990, Bedrock geology of the Fairbanks Mining District: Alaska Division of Geological and Geophysical Surveys Professional Report 106, scale 1:63,360.
    GU1Nokleberg, W.J., Richter, D.H., Ferrians, O.J., Lange, I.M., Campbell, D.L., Aleinikoff, J.N., Smith, T.E., and Koch, R.D., in press, Introduction, previous studies, acknowledgements, detailed description of map units, geologic and tectonic summary, and references cited for preliminary geologic map of the Gulkana quadrangle, eastern Alaska Range and northern Copper River basin, Alaska: U.S. Geological Survey Open-File Report, in press [CAD coverage 1997]
    HE1Csejtey, Bela, Jr., Mullen, M.W., Cox, D.P., and Stricker, G.D., 1992, Geology and geochronology of the Healy quadrangle, south-central Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1961, scale 1:250,000, 63 p.
    HE2Smith, T.E., 1981, Geology of the Clearwater Mountains, south-central Alaska: Alaska Division of Geological and Geophysical Surveys Geologic Report 60, 1 sheet, scale 1:63,360, 73 p.
    HE3Smith, T.E., Albanese, M.D., and Kline, G.L., 1984, Geologic map of the Healy A-2 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 95, 1 sheet, scale 1:63,360.
    ID1Miller, M.L, and Bundtzen, T.K., 1994, Generalized geologic map of the Iditarod quadrangle, Alaska, showing potassium-argon, major-oxide, trace-element, fossil, paleocurrent, and archaeological sample localities: U.S. Geological Survey Miscellaneous Field Studies Map MF-2219A, scale 1:250,000, 48 p. (With revisions from unpublished data, M.L. Miller and T.K. Bundtzen, 1997)
    KH1Chapman, R.M., Yeend, W.E., Patton, W.W., Jr., 1975, Preliminary reconnaissance geologic map of the western half of Kantishna River quadrangle, Alaska: U.S. Geological Survey Open File Report 75-351, scale 1:250,000.
    KH2Chapman, R.M., and Yeend, Warren, 1981, Geologic reconnaissance of the east half of Kantishna River quadrangle and adjacent areas, in Albert, N.R.D., and Hudson, Travis, ed., The United States Geological Survey in Alaska: Accomplishments during 1979: U.S. Geological Survey Circular 823-B, p. B30-B32.
    KH3Weber, F.R, Unpublished mapping, 1997, scale 1:250,000.
    KT1Patton, W.W., Jr., 1966, Regional geology of the Kateel River quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Map I-437, 1 sheet, 1:250,000. (With revisions from unpublished data, W.W. Patton, Jr., 1997)
    LH1Gamble, B.M., and Reed, B.L., 1996, Preliminary geologic map of the eastern half of the Lime Hills quadrangle, Alaska: unpublished U.S. Geological Survey map compilation, scale 1:250,000.
    LH2Bundtzen, T.K., West half of the Lime Hills quadrangle, Alaska: Unpublished mapping, 1997.
    LH2Reed, B.L., and Gamble, B.M., 1988, Preliminary geologic map of the Lime Hills quadrangle, Alaska, in Gamble, B.M., Allen, M.S., McCammon, R.B., Root, D.H., Scott, W.A., Griscom, Andrew, Krohn, M.D., Ehmann, W.J., and Southworth, S.C., Lime Hills quadrangle, Alaska -- An AMRAP planning document: U.S. Geological Survey Administrative report, 167 p., 22 plates. (Used only the west half of this map, see above.)
    LG1Weber, F.R., Wheeler, K.L., Rinehart, C.D., Chapman, R.M., and Blodgett, R.B., 1992, Geologic map of the Livengood quadrangle, Alaska: U.S. Geological Survey Open-File Report 92-562, 19 p., scale 1:250,000. (With revisions from unpublished data, F.R. Weber, 1997)
    FMD1Newberry, R.J., Bundtzen, T.K, Clautice, K.H., Combellick, R.A., Douglas, T., Laird, G.M., Liss, S.A., Pinney, D.S., Reifenstuhl, R.R., and Solie, D.N., 1996, Preliminary geologic map of the Fairbanks Mining District, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 96-16, scale 1:63,360.
    FMD1Robinson, M.S., Smith, T.E., and Metz, P.A., 1990, Bedrock geology of the Fairbanks Mining District: Alaska Division of Geological and Geophysical Surveys Professional Report 106, scale 1:63,360.
    MG1Bundtzen, T.K., Harris, E.E., and Gilbert, W.G., 1997, Geologic map of the eastern half of the McGrath quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 97-14a, scale 1:125,000, 34 p.
    MG2Bundtzen, T.K., 1997, Unpublished draft compilation of the western half of the McGrath quadrangle, Alaska, Cited references include:
    Babcock, L.E., Blodgett, R.B., and St. John, J., 1994, New Late(?) Proterozoic age formations in the vicinity of Lone Mountain, McGrath quadrangle, west-central Alaska: U.S. Geological Survey Bulletin 2107, p. 143-156.
    Blodgett, R.B. and Gilbert, W.G., The Cheeneetuk Limestone -- a new Early(?) to Middle Devonian Formation in the McGrath A-4 and A-5 quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 85, 6 p., 1 sheet, scale 1:63,360.
    Bundtzen, T.K., 1986, Geology and prospect examination of the Vinasale Mt.-Alder Creek area, McGrath C-6 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data 86-15, 10 p., 1 figure, scale 1:63,360.
    Bundtzen, T.K., and Laird, G.M., 1983, Geologic map of the McGrath D-6 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Geologic Report 79, scale 1:63,360.
    Dutro, J.T., Jr., and Patton, W.W., Jr., 1982, New Paleozoic formations in the northern Kuskokwim Mountains, west-central Alaska: U.S. Geological Survey Bulletin 1529-H, p. H13-H22.
    MD1Patton, W.W., Jr., Moll, E.J., Dutro, J.T., Jr., Silberman, M.L., and Chapman, R.M., 1980, Preliminary geologic map of the Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811A, 1 sheet, scale 1:250,000.
    OPMD1Bundtzen, T.K., Pinney, D.S., and Laird, G.M., 1997b, Preliminary geologic map and data table from the Ophir C-1 and western Medfra C-6 quadrangles, Alaska: Alaska Division Geological and Geophysical Surveys Public Data File 97-46, scale 1:63,360, 10 p.
    MH1Nokleberg, W.J., Aleinikoff, J.N., Lange, I.M., Silva, S.R., Miyaoka, R.T., Schwab, C.E., and Zehner, R.E., with contribution for selected areas from Bond, G.C., Richter, D.H., Smith, T.E., and Stout, J.H., 1992, Preliminary geologic map of the Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Open File Report 92-594, scale 1:250,000.
    MM1Csejtey, Bela, Jr., 1993, Unpublished draft compilation of the Mount McKinley quadrangle, Alaska
    MM1Gilbert, W.G., 1979, A geologic guide to Mount McKinley National Park: Alaska Natural History Association, in cooperation with the National Park Service, U.S. Dept. of the Interior, 52 p., 1 plate, scale 1:250,000.
    MM1Reed, J.C., Jr., 1961, Geology of the Mount McKinley quadrangle, Alaska: U.S. Geological Survey Bulletin 1108-A, 36 p., 1 map, scale 1:250,000.
    MZ1Patton, W.W., Miller, T.P., Chapman, R.M., and Yeend, Warren, 1978, Geologic map of the Melozitna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-1071, scale 1:250,000.
    MZ2Roeske, S.M., Dusel-Bacon , C., Aleinikoff, J.N., Snee, L.W., and Lanphere, M.A., 1995, Metamorphic and structural history of continental crust at a Mesozoic collisional margin, the Ruby terrane, central Alaska: Journal of Metamorphic Geology v. 13, p. 25-40.
    NL1Patton, W.W., Jr., 1994, Unpublished draft compilation of the Nulato quadrangle, Alaska.
    OP1Chapman, R. M., Patton, W. W. Jr., and Moll, E. J., 1985, Reconnaissance geologic map of the Ophir quadrangle, Alaska: U.S. Geological Survey Open-File Report 85-203, 1 sheet, scale 1:250,000.
    OP1Chapman, R.M., Patton, W.W. Jr., and Moll, E.J., 1982, Preliminary summary of geology in eastern part of Ophir quadrangle, in Coonrad, W.L., ed., The United States Geological Survey in Alaska: Accomplishments during 1980: U.S. Geological Survey Circular 844, p. 70-73.
    OPMD1Bundtzen, T.K., Pinney, D.S., and Laird, G.M., 1997b, Preliminary geologic map and data table from the Ophir C-1 and western Medfra C-6 quadrangles, Alaska: Alaska Division Geological and Geophysical Surveys Public Data File 97-46, scale 1:63,360, 10 p.
    RB1Cass, J.T., 1959, Reconnaissance geologic map of the Ruby quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigation Map I-289, 1 sheet, scale 1:250:000 [Geologic linework transcribed by David Dempsey, 1996, to fit modern topographic base].
    RB2Chapman, R.M., and Patton, W.W., Jr., 1978, Preliminary summary of the geology in the northwest part of the Ruby quadrangle, in Johnson, K.M., ed., The United States Geological Survey in Alaska: Accomplishments during 1977: U.S. Geological Survey Circular 772-B, p. B39-B41.
    RB3Chapman, R.M., and Patton, W.W., Jr., 1979, Two upper Paleozoic rock units identified in southwestern part of the Ruby quadrangle, in Johnson, K.M., and Williams, J.R., eds., The United States Geological Survey in Alaska: Accomplishments during 1978: U.S. Geological Survey Circular 804-B, p. B59-B61.
    RB4Puchner, C.C., 1984, Geologic map of the Ruby/Poorman area: Unpublished Anaconda Mining Company Report, scale 1:250,000, written commun., 1997.
    RB5Dusel-Bacon, Cynthia, Brosge, W.P., Till, A.B., Doyle, E.O., Mayfield, C.F., Reiser, H.N., and Miller, T.P., 1989, Distribution, facies, ages, and proposed tectonic associations of regionally metamorphosed rocks in northern Alaska: U.S. Geological Survey Professional Paper 1497-A, 44 p., 2 plates., 1:1,000,000-scale.
    SM1Miller, M.L., Belkin, H.E., Blodgett, R.B., Bundtzen, T.K., Cady, J.W., Goldfarb, R.J., Gray, J.E., McGimsey, R.G., and Simpson, S.L., 1989, Pre-field study and mineral resource assessment of the Sleetmute quadrangle, southwestern Alaska: U.S. Geological Survey Open-File Report 89-363, 115 p., 1 map, scale 1:250,000.
    SM2Bundtzen, T.K., Laird, G.M., Harris, E.E., Kline, J.T., and Miller, M.L., 1993, Geologic map of the Sleetmute C-7, D-7, C-8, and D-8 Quadrangles, Horn Mountains area, southwest Alaska: Alaska Division of Geological and Geophysical Surveys Public-Data File 93-47, 15 p., 2 sheets, scale 1:63,360.
    TL1Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle, Alaska: U.S. Geological Survey, Miscellaneous Investigation Series Map I-1174, 15 pages, 1 plate, scale 1:250,000.
    TK1Csejtey, Bela, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A., Smith, J.G., and Silberman, M.L., 1978, Reconnaissance geologic map and geochronology, Talkeetna Mountains quadrangle, northern part of Anchorage quadrangle, and southwest corner Healy quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-558A, scale 1:250,000, 60 p.
    TK2Kline, J.T., Bundtzen, T.K., and Smith, T.E., 1990, Preliminary bedrock geologic map of the Talkeetna Mountains D-2 quadrangle, Alaska: Alaska Division Geological and Geophysical Surveys Public Data File 90-24, scale 1:63,360, not paginated.
    TN1Dover, J.H., 1997, Unpublished draft compilation of the Tanana quadrangle, Alaska, scale 1:250,000.
    TN1Chapman, R.M., Yeend, Warren, Brosge, W.P., and Reiser, H.N., 1982, Reconnaissance geologic map of the Tanana quadrangle, Alaska: U.S. Geological Survey Open-File Report 82-734, scale 1:250,000, 18 p.
    TN2Reifenstuhl, R.R., Dover, J.H., Pinney, D.S., Newberry, R.J., Clautice, K.H., Liss, S.A., Blodgett, R.B., Bundtzen, T.K., and Weber, F.R., 1997, Geologic map of the Tanana B-1 quadrangle, central Alaska: Alaska Department of Geological and Geophysical Surveys Report of Investigations 97-15a, scale 1:63,360, 17 p.
    TN3Reifenstuhl, R.R., Dover, J.H., Newberry, R.J., Clautice, K.H., Liss, S.A., Blodgett, R.B., and Weber, F.R., 1998, Geologic map of the Tanana A-1 and A-2, central Alaska: Alaska Department of Geological and Geophysical Surveys Public Data File 98-37a, scale 1:63,360.
    TY1Haeussler, P.J., 1997, Unpublished draft compilation of the Tyonek quadrangle, Alaska, scale 1:250,000.
    TY1Magoon, L.B. Adkison, W.L., and Egbert, R.M, 1976, Map showing geology, wildcat wells, Tertiary plant localities, K/Ar age dates, and petroleum operations, Cook Inlet area, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1019, scale 1:250,000, 3 sheets.
    TY2Reed, B.L, and Elliott, R.L., 1970, Reconnaissance geologic map, analyses of bedrock and stream sediment samples, and an aeromagnetic map of parts of the southern Alaska Range: U.S. Geological Survey Open File Report 70-271, scale 1:63,360, 24 p.
    TY3Solie, D.N., Gilbert, W.G., Harris, E.E., Kline, J.T., Liss, S.A., and Robinson, M.S., 1991, Preliminary geologic map of Tyonek D-6 and eastern Tyonek D-7 quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Public-data File 91-10, scale 1:63,360, 15 p., not paginated.
    VA1Winkler, G.R., Silberman, M.L., Grantz, Arthur, Miller, R.J., and MacKevett, E.M., Jr., 1980, Geologic map and summary geochronology of the Valdez quadrangle, southern Alaska: U.S. Geological Survey Open-File Report 80-892-A, scale 1:250,000, 2 sheets. (With revisions from unpublished data, G.R. Winkler, 1997)
    VA2Plafker, George, Lull, J.S., Nokleberg, W.J., Pessel, G.A., Wallace, W.K., and Winkler, G.R., 1992, Geologic map of the Valdez A-4, B-3, B-4, C-3, C-4, D-4 quadrangles, northern Chugach Mountains and southern Copper River basin, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-2164.
    cover.PAT
    Polygons of geologic significance
    CLASS
    Integer indicating the geologic unit used by the author of the source map (the map from which the current authors derived this overall compilation).
    ValueDefinition
    99bu; Bedrock of unknown type or age
    100Qs; Surficial deposits, undifferentiated
    101g
    300Qv; Volcanic rocks, undivided
    301Qw
    312Qdf
    314Qva
    315Qmsv
    316Qat
    320Qcs
    350QTb
    400Qi
    401Qvd
    403Qds
    450QTv; Volcanic rocks, undivided
    451QTa
    455QTw
    460QTi; Intrusive rocks, undivided
    465QTva
    500Tsu; Sedimentary rocks, undivided
    540Tsf; Sterling Formation
    545Tkb; Beluga Formation
    560Tk; Kenai Group, undivided
    570Tn; Nenana Gravel
    571Tn?
    600Tty; Tyonek Formation
    640Tcb; Coal-bearing rocks
    670Tts; Tsadaka Formation
    790Ttw; Tsadaka, West Foreland, and Wishbone Formations, undivided
    795Tvs; Volcanic and sedimentary rocks, undivided
    855Twf; West Foreland Formation
    870Tw; Wishbone Formation
    880Tfv; Fluviatile sedimentary rocks and subordinate volcanic rocks
    890Tar; Arkose Ridge Formation
    900Tch; Chickaloon Formation
    910Tjc
    950Tos; Sedimentary rocks of the Orca Group
    951Tovs; Orca Group, undivided
    952Toc; Conglomerate of the Orca Group
    1000Tvu; Volcanic rocks, undivided
    1001Trs; Rhyolitic volcanic and sedimentary rocks
    1004Tb; Basalt
    1007Thf; Hypabyssal felsic and intermediate intrusive rocks
    1010Thf; Hypabyssal felsic and intermediate intrusive rocks
    1011Thf; Hypabyssal felsic and intermediate intrusive rocks
    1012Thm; Hypabyssal mafic intrusive rocks
    1022Thd; Hornblende dacite
    1052Tba; Basaltic andesite
    1070Tvr; Crystal and crystal-lithic ash-flow tuff
    1081Tvb; Andesite and basalt
    1105Tva
    1135Tov; Volcanic rocks of the Orca Group, undivided
    1140Tcv; Volcanic rocks of the Cantwell Formation
    1210Tiv; Granitic and volcanic rocks, undivided
    1270Togr; Granite
    1290Toegr; Granitic rocks
    1292Toem; Granodiorite to tonalite
    1300Tgr
    1301Td; Felsic intrusive rocks
    1307Tgdp
    1310Tegr; Granite and granodiorite
    1320Tpgr; Granitic rocks
    1350Thgd; Granodiorite and other intermediate plutonic rocks
    1380Tgl; Gabbro
    1510TKcg; Conglomerate, sandstone, and lignite
    1600TKv; Flows, tuff, and breccia, undivided
    1601TKd; Dikes and subvolcanic rocks of intermediate composition
    1602TKgp; Hypabyssal granite porphyry dikes and rhyolitic sills, and plugs
    1603TKvr; Rhyolite and related rocks
    1604TKvd
    1605TKvi; Andesite and related rocks
    1615TKv; Flows, tuff, and breccia, undivided
    1620TKd; Dikes and subvolcanic rocks of intermediate composition
    1625TKvr; Rhyolite and related rocks
    1630TKiv; Mafic to intermediate volcano-plutonic complexes
    1650TKi; Intrusive rocks, undivided
    1655TKg; Granitic rocks
    1660TKm
    1665TKqd; Quartz diorite and diorite dikes and stocks
    1670TKgb; Gabbro and leucogabbro
    1680TDg; Gabbro
    1690TKl; Lamprophyre, alkali gabbro, and alkali diorite
    1710TKc; Melange or cataclastite of the Orca Group
    1720TKgg; Gneissose granitic rocks
    1790TKmx
    1800Ksu
    1825Kvm; Volcanic graywacke and conglomerate
    1905Ksh
    1906Ksa
    1907Kvss
    1908Kvg
    1920Kcs; Cantwell Formation, sedimentary rocks subunit
    1940Kk; Kuskokwim Group, deep marine rocks
    1941Kss; Nonmarine sandstone, quartz conglomerate, shale, and siltstone
    1942Kk; Kuskokwim Group, deep marine rocks
    1970Kk; Kuskokwim Group, deep marine rocks
    1980Kms; Minto unit
    1985Kkn; Kuskokwim Group, non-marine and shallow-marine rocks
    1990Kqc; Quartz-pebble conglomerate
    2010Km; Matanuska Formation
    2020Kme; Melozitna sequence
    2021Kms; Minto unit
    2024Kccf
    2030Kcg; Igneous pebble-cobble conglomerate
    2100Knl; Nelchina Limestone
    2101Ksse; Marine sandstone and siltstone
    2105Kvgm; Volcanic graywacke and mudstone
    2110Kbc
    2115Kwcf; Wilber Creek flysch
    2125Ksm; Quartz-carbonate sandstone and pebbly mudstone
    2152Km; Matanuska Formation
    2170Kuc
    2180Kvm; Volcanic graywacke and conglomerate
    2181Kvm; Volcanic graywacke and conglomerate
    2190Kmk
    2192Kmar; Melanges of the Alaska Range
    2193TrSl
    2195Kmar; Melanges of the Alaska Range
    2196TrSl
    2197mlu; Ultramafic and associated rocks
    2210Kve; Andesite and related rocks
    2230Kve; Andesite and related rocks
    2255Kvl; Volcanic rocks
    2256Kvl; Volcanic rocks
    2260Kvl; Volcanic rocks
    2261Kvl; Volcanic rocks
    2270Kvl; Volcanic rocks
    2320Ktg; Volcaniclastic rocks
    2330Kve; Andesite and related rocks
    2400Kg; Granitic rocks
    2410Kg; Granitic rocks
    2411Kgt
    2420Kgd
    2440Kmum; Mafic and ultramafic rocks
    2445Kmum; Mafic and ultramafic rocks
    2450Kg; Granitic rocks
    2460Kg; Granitic rocks
    2465Kg; Granitic rocks
    2470Kg; Granitic rocks
    2475Kg; Granitic rocks
    2480Kg; Granitic rocks
    2510Kmum; Mafic and ultramafic rocks
    2530Kg; Granitic rocks
    2540Kg; Granitic rocks
    2570Ktt; Leucotonalite and trondhjemite
    2600Kmi
    2630Mzsa; Schist and amphibolite
    2640Khg
    2670Kmum; Mafic and ultramafic rocks
    2700Kvs; Metasedimentary rocks of the Valdez Group
    2705Kvv; Metavolcanic rocks of Valdez Group
    2720PPaskm; Marble
    2812KJwc; Wilber Creek flysch and Wolverine quartzite, undivided
    2815KJw; Wolverine quartzite
    2816KJw; Wolverine quartzite
    2817KJw; Wolverine quartzite
    2820KJfn; Flysch sequence
    2821KJcg; Conglomerate, sandstone, siltstone, shale, and volcanic rocks
    2825KJfm; Metasedimentary rocks
    2850KJf; Kahiltna flysch sequence
    2851KJfk; Flysch sequence
    2852KJfn; Flysch sequence
    2860KJvr; Vrain unit
    2875KJvt
    2890JTrtv
    2900KJg; Granitic rocks
    2920Jmu; Mafic and ultramafic rocks
    2945Jum
    2970KJfm; Metasedimentary rocks
    3010Jn; Naknek Formation
    3030Jc; Chinitna Formation
    3110Jkt; Kotsina Conglomerate
    3120Juc
    3140Jtxc
    3180Jtx; Tuxedni Group
    3210JTrtv
    3250JTrtk
    3340Jmu; Mafic and ultramafic rocks
    3345Jmu; Mafic and ultramafic rocks
    3380Jtr; Trondhjemite
    3390Jmu; Mafic and ultramafic rocks
    3401Jgr
    3402Jgd
    3403Jqd
    3404Jqt
    3405Jmu; Mafic and ultramafic rocks
    3480Jan
    3490Jmu; Mafic and ultramafic rocks
    3491Jmu; Mafic and ultramafic rocks
    3495Jmu; Mafic and ultramafic rocks
    3496Jtu; Ultramafic rocks, undivided
    3497Jtu; Ultramafic rocks, undivided
    3498Jtu; Ultramafic rocks, undivided
    3540Jmu; Mafic and ultramafic rocks
    3545Jmu; Mafic and ultramafic rocks
    3600PPast; Strelna metamorphic complex
    3610Jsch; Greenschist and blueschist
    3621PPast; Strelna metamorphic complex
    3700Jps; Pelitic schist
    3820JTrmc
    3821JTrmc
    3830JTrsu
    3850JTrct
    3851JTrta
    4020Trk
    4021Trlb
    4025Trlst
    4030JTrlm
    4031JTrlm
    4032Trsl
    4033Trcs
    4035Trcg
    4050Trcg
    4060Trr
    4080Trgl
    4110Trcs
    4205Trvs
    4210Trn
    4215JTrtv
    4235JTrct
    4320Trgb
    4321Trgb
    4340Trc
    4410Trnm
    4420Trn
    4421Trn
    4422Trn
    4423Trn?
    4425Trc
    4430Trn
    4440Trmm
    4450Trnm
    4710MzPzgs
    4800Mzi; Intrusive rocks
    4880Mzm
    4890Mzum; Ultramafic and associated rocks
    4891Mzum; Ultramafic and associated rocks
    4905JPzk; Kakhonak Complex
    4920JPzk; Kakhonak Complex
    5012TrPs
    5020TrMts
    5021TrMis
    5030TrPzvs
    5040TrPas
    5110TrDv
    5111TrMica
    5112TrMica
    5113JPztm; Mafic and ultramafic rocks, undivided
    5120MzPzi; Intrusive and volcanic rocks, undivided
    5130JTrtmu
    5131TrMtsu
    5132JMtru; Greenstone, chert, and ultramafic rocks, undivided
    5133JMtu; Mafic, ultramafic, and sedimentary rocks, undivided
    5140JMab; Basalt and chert
    5150Jaum; Ultramafic rocks (Jurassic?)
    5160MzPzi; Intrusive and volcanic rocks, undivided
    5170MzPzg
    5175MzPzi; Intrusive and volcanic rocks, undivided
    5180MzPzi; Intrusive and volcanic rocks, undivided
    5190MzZum; Ultramafic and mafic rocks, undivided
    5191Jium; Ultramafic and mafic rocks, undivided
    5200Jsch; Greenschist and blueschist
    5201Trcs
    5202Pe; Eagle Creek Formation
    5203PPast; Strelna metamorphic complex
    5204PPast; Strelna metamorphic complex
    5205Mzsa; Schist and amphibolite
    5206Mzpca; Phyllite, pelitic schist, calc-schist, and amphibolite of the MacLaren metamorphic belt
    5207Trcs
    5208TPza; Amphibolite facies metamorphic rocks
    5209PPast; Strelna metamorphic complex
    5210Mzpca; Phyllite, pelitic schist, calc-schist, and amphibolite of the MacLaren metamorphic belt
    5211MzPzaq
    5215Mzpca; Phyllite, pelitic schist, calc-schist, and amphibolite of the MacLaren metamorphic belt
    5216KJvr?
    5220JPzk; Kakhonak Complex
    5245JPaur; Uranatina metaplutonic complex
    5250MzPmi
    5285Pzrmi; Metamorphosed mafic igneous rocks
    5290MzZum; Ultramafic and mafic rocks, undivided
    5310DCd; Dillinger sequence, undivided
    5320Pzld
    5330Pzlc; Limestone and chert
    5340Pzrm; Marble
    5341PPl
    5370JCmd; Mystic and Dillinger stratigraphic sequences, undivided
    5375JDm; Mystic stratigraphic sequence, undivided
    5410Pzvs; Volcanic and sedimentary rocks
    5440MzPzi; Intrusive and volcanic rocks, undivided
    5450JTrtv
    5460Pagb; Gabbro and orthogneiss
    5475Pze; Eclogite-bearing schist
    5510Pze; Eclogite-bearing schist
    5525Dm; Marble
    5542TrMtqp
    5545PMpc; Phyllite and chert
    5550PPast; Strelna metamorphic complex
    5600PDms; Sedimentary rocks
    5605MDtm; Mylonitic Totatlanika Schist
    5615PDms; Sedimentary rocks
    5620Pat; Tetelna Volcanics
    5621Pat; Tetelna Volcanics
    5625PPast; Strelna metamorphic complex
    5630PPasc; Station Creek and Slana Spur Formations, and equivalent rocks
    5640JPzsgs; Greenstone and chert
    5641PPast; Strelna metamorphic complex
    5660Pzk; Keevy Peak Formation
    5662Pzkcp; Calcareous and phyllitic rocks
    5666Pzsc; Spruce Creek sequence and correlative rocks
    5670PzZyg; Gneiss
    5680PPast; Strelna metamorphic complex
    5690MzZum; Ultramafic and mafic rocks, undivided
    5740Ps; Argillite, siltstone, sandstone, and minor conglomerate
    5745Pig; Graywacke
    5830JPzsgs; Greenstone and chert
    5860Pmi; Shallow stocks, dikes, and sills
    5870Pmgi
    5880PPad; Diorite complex
    5920PPast; Strelna metamorphic complex
    5950Pe; Eagle Creek Formation
    5955Pzskm
    5960JPzsgs; Greenstone and chert
    5980JPsu; Ultramafic rocks
    6010PDsc; Sheep Creek Formation and correlative siliciclastic units
    6080TrMica
    6110PPagi; Ahtell pluton
    6120Pat; Tetelna Volcanics
    6220Pat; Tetelna Volcanics
    6320MDl; Fine-grained limestone
    6335PMl; Younger limestone
    6380MDl; Fine-grained limestone
    6390TrMica
    6510MDt?
    6511MDt?
    6521MDyao; Augen orthogneiss
    6522MDrao; Augen orthogneiss
    6530Mgq; Globe quartzite
    6615DSmdl; Unnamed limestone
    6620Spf; Paradise Fork Formation and unnamed correlative rocks
    6630Sa
    6640Ss
    6660Stc; Terra Cotta Mountains Sandstone and correlative units
    6680SZa; Amy Creek unit
    6681SZa?
    6902Dp
    6905Dm; Marble
    6910Dtr; Troublesome unit and possibly correlative rocks
    6911Dsc; Shale and chert
    6920Dq; Quail unit
    6921Dq?
    6922Dq2?
    6930DSl; Limestone
    6931DSml
    6940Dcb; Cascaden Ridge, Beaver Bend, and correlative rocks
    6944DSl; Limestone
    6945Ds; Schwatka limestone unit
    6952DSca
    6955Dlc
    6956DSls?
    6957DSls
    6960DSwc; Whirlwind Creek Formation and unnamed correlative units
    6965DSt; Tolovana Limestone
    6966DSt?
    7010Dsv; Volcanic part of Schwatka unit
    7240Dyv; Fine-grained schistose volcanic rocks
    7242Dy; Yanert Fork sequence and correlative rocks
    7250MDyao; Augen orthogneiss
    7290Pzsc; Spruce Creek sequence and correlative rocks
    7291Pzsc?
    7300Pzsc; Spruce Creek sequence and correlative rocks
    7320Pzsc; Spruce Creek sequence and correlative rocks
    7325Dmgs
    7330Dmg
    7402Dys; Fine-grained schistose sedimentary rocks
    7520Ont; Novi Mountain and Telsitna Formations, and unnamed correlative rocks
    7580SCpl; Post River Sandstone, Lyman Hills Formation, and correlative units
    7610Ofc; Fossil Creek Volcanics
    7710Och
    7711Oldl
    8000CZwl; Wickersham limestone
    8250CZum
    8300CZw; Wickersham grit, undivided
    8310CZwa; Argillaceous upper unit
    8340DZn; Shallow-marine carbonate units of Holitna basin area, undivided
    8350CZds; Unnamed dolostone, sandstone, siltstone
    8410Zwg; Gritty lower unit
    8430ls
    8450MzZum; Ultramafic and mafic rocks, undivided
    8600YZnm
    8601PzZrqs; Pelitic and quartzitic schist
    8610YZnc
    8615Pzydm; Dolostone and marble
    8620Pzrm; Marble
    8625PzZm
    8630PzZysa; Schist and amphibolite
    8632PzZpg
    8633PzZaqs; Pelitic and quartzose schist of the Alaska Range
    8640YZns
    8650PzZrmc
    8660PzZms
    8700YZnv
    8710Ynqd; Meta-quartz diorite
    8801PzZrpg; Quartzofeldspathic paragneiss and quartzite
    8802PzZypg
    8803PzZrpg; Quartzofeldspathic paragneiss and quartzite
    9060pCu
    9320PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9321PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9322PzZaqs; Pelitic and quartzose schist of the Alaska Range
    9323PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9324PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9325PzZrqs; Pelitic and quartzitic schist
    9326PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9327PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9400Xi; Idono metamorphic complex
    SOURCE
    Publication from which the base data for this feature were obtained. The values are short character strings consisting of a two-letter abbreviation for the quadrangle name and a 3-digit sequence number for the source. Values are as shown for SOURCE in the AAT.
    NSACLASS
    Integer indicating the geologic unit or type of mapped feature. These units have been coded the same across all of the quadrangles in the study where it was practical to do so. As noted in the textual report, this was not always possible (further field work must be undertaken to resolve differences in concept used by the authors of the source maps).
    ValueDefinition
    99bu; Bedrock of unknown type or age
    100Qs; Surficial deposits, undifferentiated
    300Qv; Volcanic rocks, undivided
    450QTv; Volcanic rocks, undivided
    460QTi; Intrusive rocks, undivided
    500Tsu; Sedimentary rocks, undivided
    540Tsf; Sterling Formation
    545Tkb; Beluga Formation
    560Tk; Kenai Group, undivided
    570Tn; Nenana Gravel
    600Tty; Tyonek Formation
    640Tcb; Coal-bearing rocks
    670Tts; Tsadaka Formation
    790Ttw; Tsadaka, West Foreland, and Wishbone Formations, undivided
    795Tvs; Volcanic and sedimentary rocks, undivided
    855Twf; West Foreland Formation
    870Tw; Wishbone Formation
    880Tfv; Fluviatile sedimentary rocks and subordinate volcanic rocks
    890Tar; Arkose Ridge Formation
    900Tch; Chickaloon Formation
    950Tos; Sedimentary rocks of the Orca Group
    951Tovs; Orca Group, undivided
    952Toc; Conglomerate of the Orca Group
    1000Tvu; Volcanic rocks, undivided
    1001Trs; Rhyolitic volcanic and sedimentary rocks
    1004Tb; Basalt
    1007Thf; Hypabyssal felsic and intermediate intrusive rocks
    1010Thf; Hypabyssal felsic and intermediate intrusive rocks
    1011Thf; Hypabyssal felsic and intermediate intrusive rocks
    1012Thm; Hypabyssal mafic intrusive rocks
    1022Thd; Hornblende dacite
    1052Tba; Basaltic andesite
    1070Tvr; Crystal and crystal-lithic ash-flow tuff
    1081Tvb; Andesite and basalt
    1135Tov; Volcanic rocks of the Orca Group, undivided
    1140Tcv; Volcanic rocks of the Cantwell Formation
    1210Tiv; Granitic and volcanic rocks, undivided
    1270Togr; Granite
    1290Toegr; Granitic rocks
    1292Toem; Granodiorite to tonalite
    1301Td; Felsic intrusive rocks
    1310Tegr; Granite and granodiorite
    1320Tpgr; Granitic rocks
    1350Thgd; Granodiorite and other intermediate plutonic rocks
    1380Tgl; Gabbro
    1510TKcg; Conglomerate, sandstone, and lignite
    1600TKv; Flows, tuff, and breccia, undivided
    1601TKd; Dikes and subvolcanic rocks of intermediate composition
    1602TKgp; Hypabyssal granite porphyry dikes and rhyolitic sills, and plugs
    1603TKvr; Rhyolite and related rocks
    1605TKvi; Andesite and related rocks
    1615TKv; Flows, tuff, and breccia, undivided
    1620TKd; Dikes and subvolcanic rocks of intermediate composition
    1625TKvr; Rhyolite and related rocks
    1630TKiv; Mafic to intermediate volcano-plutonic complexes
    1650TKi; Intrusive rocks, undivided
    1655TKg; Granitic rocks
    1665TKqd; Quartz diorite and diorite dikes and stocks
    1670TKgb; Gabbro and leucogabbro
    1680TDg; Gabbro
    1690TKl; Lamprophyre, alkali gabbro, and alkali diorite
    1710TKc; Melange or cataclastite of the Orca Group
    1720TKgg; Gneissose granitic rocks
    1825Kvm; Volcanic graywacke and conglomerate
    1920Kcs; Cantwell Formation, sedimentary rocks subunit
    1940Kk; Kuskokwim Group, deep marine rocks
    1941Kss; Nonmarine sandstone, quartz conglomerate, shale, and siltstone
    1942Kk; Kuskokwim Group, deep marine rocks
    1970Kk; Kuskokwim Group, deep marine rocks
    1980Kms; Minto unit
    1985Kkn; Kuskokwim Group, non-marine and shallow-marine rocks
    1990Kqc; Quartz-pebble conglomerate
    2010Km; Matanuska Formation
    2020Kme; Melozitna sequence
    2021Kms; Minto unit
    2030Kcg; Igneous pebble-cobble conglomerate
    2100Knl; Nelchina Limestone
    2101Ksse; Marine sandstone and siltstone
    2105Kvgm; Volcanic graywacke and mudstone
    2115Kwcf; Wilber Creek flysch
    2125Ksm; Quartz-carbonate sandstone and pebbly mudstone
    2152Km; Matanuska Formation
    2180Kvm; Volcanic graywacke and conglomerate
    2181Kvm; Volcanic graywacke and conglomerate
    2192Kmar; Melanges of the Alaska Range
    2195Kmar; Melanges of the Alaska Range
    2197mlu; Ultramafic and associated rocks
    2210Kve; Andesite and related rocks
    2230Kve; Andesite and related rocks
    2255Kvl; Volcanic rocks
    2256Kvl; Volcanic rocks
    2260Kvl; Volcanic rocks
    2261Kvl; Volcanic rocks
    2270Kvl; Volcanic rocks
    2320Ktg; Volcaniclastic rocks
    2330Kve; Andesite and related rocks
    2400Kg; Granitic rocks
    2410Kg; Granitic rocks
    2440Kmum; Mafic and ultramafic rocks
    2445Kmum; Mafic and ultramafic rocks
    2450Kg; Granitic rocks
    2460Kg; Granitic rocks
    2465Kg; Granitic rocks
    2470Kg; Granitic rocks
    2475Kg; Granitic rocks
    2480Kg; Granitic rocks
    2510Kmum; Mafic and ultramafic rocks
    2530Kg; Granitic rocks
    2540Kg; Granitic rocks
    2570Ktt; Leucotonalite and trondhjemite
    2630Mzsa; Schist and amphibolite
    2670Kmum; Mafic and ultramafic rocks
    2700Kvs; Metasedimentary rocks of the Valdez Group
    2705Kvv; Metavolcanic rocks of Valdez Group
    2720PPaskm; Marble
    2812KJwc; Wilber Creek flysch and Wolverine quartzite, undivided
    2815KJw; Wolverine quartzite
    2816KJw; Wolverine quartzite
    2817KJw; Wolverine quartzite
    2820KJfn; Flysch sequence
    2821KJcg; Conglomerate, sandstone, siltstone, shale, and volcanic rocks
    2825KJfm; Metasedimentary rocks
    2850KJf; Kahiltna flysch sequence
    2851KJfk; Flysch sequence
    2852KJfn; Flysch sequence
    2860KJvr; Vrain unit
    2900KJg; Granitic rocks
    2920Jmu; Mafic and ultramafic rocks
    2970KJfm; Metasedimentary rocks
    3010Jn; Naknek Formation
    3030Jc; Chinitna Formation
    3110Jkt; Kotsina Conglomerate
    3180Jtx; Tuxedni Group
    3340Jmu; Mafic and ultramafic rocks
    3345Jmu; Mafic and ultramafic rocks
    3380Jtr; Trondhjemite
    3390Jmu; Mafic and ultramafic rocks
    3405Jmu; Mafic and ultramafic rocks
    3490Jmu; Mafic and ultramafic rocks
    3491Jmu; Mafic and ultramafic rocks
    3495Jmu; Mafic and ultramafic rocks
    3496Jtu; Ultramafic rocks, undivided
    3497Jtu; Ultramafic rocks, undivided
    3498Jtu; Ultramafic rocks, undivided
    3540Jmu; Mafic and ultramafic rocks
    3545Jmu; Mafic and ultramafic rocks
    3600PPast; Strelna metamorphic complex
    3610Jsch; Greenschist and blueschist
    3621PPast; Strelna metamorphic complex
    3700Jps; Pelitic schist
    4800Mzi; Intrusive rocks
    4890Mzum; Ultramafic and associated rocks
    4891Mzum; Ultramafic and associated rocks
    4905JPzk; Kakhonak Complex
    4920JPzk; Kakhonak Complex
    5113JPztm; Mafic and ultramafic rocks, undivided
    5120MzPzi; Intrusive and volcanic rocks, undivided
    5132JMtru; Greenstone, chert, and ultramafic rocks, undivided
    5133JMtu; Mafic, ultramafic, and sedimentary rocks, undivided
    5140JMab; Basalt and chert
    5150Jaum; Ultramafic rocks (Jurassic?)
    5160MzPzi; Intrusive and volcanic rocks, undivided
    5175MzPzi; Intrusive and volcanic rocks, undivided
    5180MzPzi; Intrusive and volcanic rocks, undivided
    5190MzZum; Ultramafic and mafic rocks, undivided
    5191Jium; Ultramafic and mafic rocks, undivided
    5200Jsch; Greenschist and blueschist
    5202Pe; Eagle Creek Formation
    5203PPast; Strelna metamorphic complex
    5204PPast; Strelna metamorphic complex
    5205Mzsa; Schist and amphibolite
    5206Mzpca; Phyllite, pelitic schist, calc-schist, and amphibolite of the MacLaren metamorphic belt
    5208TPza; Amphibolite facies metamorphic rocks
    5209PPast; Strelna metamorphic complex
    5210Mzpca; Phyllite, pelitic schist, calc-schist, and amphibolite of the MacLaren metamorphic belt
    5215Mzpca; Phyllite, pelitic schist, calc-schist, and amphibolite of the MacLaren metamorphic belt
    5220JPzk; Kakhonak Complex
    5245JPaur; Uranatina metaplutonic complex
    5285Pzrmi; Metamorphosed mafic igneous rocks
    5290MzZum; Ultramafic and mafic rocks, undivided
    5310DCd; Dillinger sequence, undivided
    5330Pzlc; Limestone and chert
    5340Pzrm; Marble
    5370JCmd; Mystic and Dillinger stratigraphic sequences, undivided
    5375JDm; Mystic stratigraphic sequence, undivided
    5410Pzvs; Volcanic and sedimentary rocks
    5440MzPzi; Intrusive and volcanic rocks, undivided
    5460Pagb; Gabbro and orthogneiss
    5475Pze; Eclogite-bearing schist
    5510Pze; Eclogite-bearing schist
    5525Dm; Marble
    5545PMpc; Phyllite and chert
    5550PPast; Strelna metamorphic complex
    5600PDms; Sedimentary rocks
    5605MDtm; Mylonitic Totatlanika Schist
    5615PDms; Sedimentary rocks
    5620Pat; Tetelna Volcanics
    5621Pat; Tetelna Volcanics
    5625PPast; Strelna metamorphic complex
    5630PPasc; Station Creek and Slana Spur Formations, and equivalent rocks
    5640JPzsgs; Greenstone and chert
    5641PPast; Strelna metamorphic complex
    5660Pzk; Keevy Peak Formation
    5662Pzkcp; Calcareous and phyllitic rocks
    5666Pzsc; Spruce Creek sequence and correlative rocks
    5670PzZyg; Gneiss
    5680PPast; Strelna metamorphic complex
    5690MzZum; Ultramafic and mafic rocks, undivided
    5740Ps; Argillite, siltstone, sandstone, and minor conglomerate
    5745Pig; Graywacke
    5830JPzsgs; Greenstone and chert
    5860Pmi; Shallow stocks, dikes, and sills
    5880PPad; Diorite complex
    5920PPast; Strelna metamorphic complex
    5950Pe; Eagle Creek Formation
    5960JPzsgs; Greenstone and chert
    5980JPsu; Ultramafic rocks
    6010PDsc; Sheep Creek Formation and correlative siliciclastic units
    6110PPagi; Ahtell pluton
    6120Pat; Tetelna Volcanics
    6220Pat; Tetelna Volcanics
    6320MDl; Fine-grained limestone
    6335PMl; Younger limestone
    6380MDl; Fine-grained limestone
    6521MDyao; Augen orthogneiss
    6522MDrao; Augen orthogneiss
    6530Mgq; Globe quartzite
    6615DSmdl; Unnamed limestone
    6620Spf; Paradise Fork Formation and unnamed correlative rocks
    6660Stc; Terra Cotta Mountains Sandstone and correlative units
    6680SZa; Amy Creek unit
    6905Dm; Marble
    6910Dtr; Troublesome unit and possibly correlative rocks
    6911Dsc; Shale and chert
    6920Dq; Quail unit
    6930DSl; Limestone
    6940Dcb; Cascaden Ridge, Beaver Bend, and correlative rocks
    6944DSl; Limestone
    6945Ds; Schwatka limestone unit
    6960DSwc; Whirlwind Creek Formation and unnamed correlative units
    6965DSt; Tolovana Limestone
    7010Dsv; Volcanic part of Schwatka unit
    7240Dyv; Fine-grained schistose volcanic rocks
    7242Dy; Yanert Fork sequence and correlative rocks
    7250MDyao; Augen orthogneiss
    7290Pzsc; Spruce Creek sequence and correlative rocks
    7300Pzsc; Spruce Creek sequence and correlative rocks
    7320Pzsc; Spruce Creek sequence and correlative rocks
    7402Dys; Fine-grained schistose sedimentary rocks
    7520Ont; Novi Mountain and Telsitna Formations, and unnamed correlative rocks
    7580SCpl; Post River Sandstone, Lyman Hills Formation, and correlative units
    7610Ofc; Fossil Creek Volcanics
    8000CZwl; Wickersham limestone
    8300CZw; Wickersham grit, undivided
    8310CZwa; Argillaceous upper unit
    8340DZn; Shallow-marine carbonate units of Holitna basin area, undivided
    8350CZds; Unnamed dolostone, sandstone, siltstone
    8410Zwg; Gritty lower unit
    8450MzZum; Ultramafic and mafic rocks, undivided
    8601PzZrqs; Pelitic and quartzitic schist
    8615Pzydm; Dolostone and marble
    8620Pzrm; Marble
    8630PzZysa; Schist and amphibolite
    8633PzZaqs; Pelitic and quartzose schist of the Alaska Range
    8710Ynqd; Meta-quartz diorite
    8801PzZrpg; Quartzofeldspathic paragneiss and quartzite
    8803PzZrpg; Quartzofeldspathic paragneiss and quartzite
    9320PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9321PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9322PzZaqs; Pelitic and quartzose schist of the Alaska Range
    9323PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9324PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9325PzZrqs; Pelitic and quartzitic schist
    9326PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9327PzZyqs; Quartz- and pelitic schist of the Yukon-Tanana Upland
    9400Xi; Idono metamorphic complex

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • U.S. Geological Survey
  2. Who also contributed to the data set?
    GIS support by contractors Jim Hall, Nathan Pannkuk, Kelly Brunt, and Dolly Perea
  3. To whom should users address questions about the data?
    USGS Minerals Resouces Program - Alaska Section
    Attn: Frederic H. Wilson
    Geologist
    4200 University Drive
    Anchorage, AK
    USA

    907-561-1181 (voice)
    907-786-7401 (FAX)
    fwilson@usgs.gov

Why was the data set created?

Digital conversion of geologic mapping of the Anchorage quadrangle, Alaska, was undertaken to generate a 1:500,000 scale digital geologic map of Alaska, and to facilitate the presentation and analysis of earth-science data. Digital maps can be displayed at any scale or projection, however the geological data in this coverage is not intended for use at a scale larger than 1:250,000.

How was the data set created?

  1. From what previous works were the data drawn?
    Winkler, G.R., 1992 (source 1 of 54)
    Winkler, G.R. (comp.), 1992, Geologic map and summary geochronology of the Anchorage 1 x 3 degree quadrangle, southern Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-2283.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    99% of line work and attributes are based from Winkler, G.R., 1992
    Weber and others, 1978 (source 2 of 54)
    Weber, F.R., Foster, H.L., Keith, T.E.C., and Dusel-Bacon, Cynthia, 1978, Preliminary geologic map of the Big Delta quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-529A.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    99% of line work and attributes are based from Weber and others, 1978
    Foster and others, 1983 (source 3 of 54)
    Foster, H.L., Laird, Jo, Keith, T.E.C., Cushing, G.W., and Menzie, D.W., 1983, Preliminary geologic map of the Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-170A.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Approximately 90% of line work and attributes are based from Foster and others, 1983
    Wiltse and others, 1995 (source 4 of 54)
    Wiltse, M.A., Reger, R.D., Newberry, R.J., Pessel, G.H., Pinney, D.S., Robinson, M.S., and Solie, D.N., 1995, Geologic map of the Circle Mining District, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 95-2a.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Source for the detailed mapping in the Circle Mining District.
    Weber, F.R., written communication, 1998 (source 5 of 54)
    Weber, F.R., Unpublished material, working compilation.

    Type_of_Source_Media: map
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Approximately 10% of the line work and attributes are based on Weber, F.R., written communication, 1998
    Pewe and others, 1966 (source 6 of 54)
    Pewe, T.L., Wahrhaftig, Clyde, and Weber, Florence, 1966, Geologic map of the Fairbanks quadrangle, Alaska: U.S. Geological Survey Geologic Investigations Series Map I-455.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Approximately 90% of line work and attributes are based from Pewe and others, 1966
    Newberry and others, 1996 (source 7 of 54)
    Newberry, R.J., Bundtzen, T.K., Clautice, K.H., Combellick, R.A., Douglas, T., Laird, G.M., Liss, S.A., Pinney, D.S., Reifenstuhl, R.R., and Solie, D.N., 1996, Preliminary geologic map of the Fairbanks Mining District, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 96-16.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Fairbanks Mining District
    Robinson and others, 1990 (source 8 of 54)
    Robinson, M.S., Smith, T.E., and Metz, P.A., 1990, Bedrock geology of the Fairbanks Mining District: Alaska Division of Geological and Geophysical Surveys Professional Report 106.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Fairbanks Mining District
    Nokleberg and others, in press (source 9 of 54)
    Nokleberg, W.J., Richter, D.H., Ferrians, O.J., Lange, I.M., Campbell, D.L., Aleinikoff, J.N., Smith, T.E.,, and Koch, R.D., unknown, Preliminary geologic map of the Gulkana quadrangle, eastern Alaska Range and northern Copper River basin, Alaska: U.S. Geological Survey Open-File Report 99-?.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Majority of the line work and attributes are based from Nokleberg and others, in press
    Csejtey and others, 1992 (source 10 of 54)
    Csejtey, Bela, Jr., Mullen, M.W., Cox, D.P., and Stricker, G.D., 1992, Geology and geochronology of the Healy quadrangle, south-central Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map Map I-1961.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Majority of the line work and attributes are based from Csejtey and others, 1992.
    Miller and Bundtzen, 1994 (source 11 of 54)
    Miller, M.L., and Bundtzen, T.K., 1994, Generalized geologic map of the Iditarod quadrangle, Alaska, showing potassium-argon, major-oxide, trace-element, fossil, paleocurrent, and archaeological sample localities: U.S. Geological Survey Miscellaneous Field Studies Map Map MF-2219A.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Majority of the line work and attributes are based from Miller and Bundtzen, 1994
    Miller and Bundzten, pers. comm., 1997 (source 12 of 54)
    Miller, M.L., and Bundtzen, T.K., Unpublished material, personal communication.

    Other_Citation_Details:
    Miller, M.L., and Bundtzen, T.K., 1997, working compilation map
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    This data was used to add and/or correct details to Miller and Bundtzen, 1994
    Chapman and others, 1975 (source 13 of 54)
    Chapman, R.M., Yeend, W.E., and Patton, W.W., Jr., 1975, Preliminary reconnaissance geologic map of the western half of Kantishna River quadrangle, Alaska: U.S. Geological Survey Open-File Report OFR75-351.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    About half of the line work and attributes are based from Chapman and others, 1975
    Weber, 1998 (source 14 of 54)
    Weber, F.R., Unpublished material, working map compilation.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: This source was used on the eastern half of the coverage
    Patton, 1997 (source 15 of 54)
    Patton, W.W., Jr., Unpublished material, working geologic map compilation.

    Other_Citation_Details: Patton, W.W., personal communication, 1997
    Type_of_Source_Media: stable-base material
    Source_Scale_Denominator: 500000
    Source_Contribution: Majority of the line work is based from Patton, 1997
    Patton, 1966 (source 16 of 54)
    Patton, W.W., Jr., 1966, Regional geology of the Kateel River quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-437.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Polygon class attributes are based on geologic unit descriptions from this source
    Weber and others, 1992 (source 17 of 54)
    Weber, F.R., Wheeler, K.L., Rinehart, C.D., Chapman, R.M.,, and Blodgett, R.B., 1992, Geologic map of the Liven good quadrangle, Alaska: U.S. Geological Survey Open-File Report OFR 92-562.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Majority of the line work and attributes are based from Weber and others, 1992
    Newberry and others, 1996 (source 18 of 54)
    Newberry, R.J., Bundtzen, T.K., Clautice, K.H., Combellick, R.A., Douglas, T., Laird, G.M., Liss, S.A., Pinney, D.S., Reifenstuhl, R.R., and Solie, D.N., 1996, Preliminary geologic map of the Fairbanks Mining District, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 96-16.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Fairbanks Mining District
    Robinson and others, 1990 (source 19 of 54)
    Robinson, M.S., Smith, T.E., and Metz, P.A., 1990, Bedrock geology of the Fairbanks Mining District: Alaska Division of Geological and Geophysical Surveys Professional Report 106.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Fairbanks Mining District
    Gamble, 1996 (source 20 of 54)
    Gamble, B.M., Unpublished material, working map compilation.

    Other_Citation_Details: Gamble, B.M., personal communication, 1997
    Type_of_Source_Media: stable-base material
    Source_Scale_Denominator: 250000
    Source_Contribution:
    The line work and attributes on the eastern half are based from Gamble, 1996
    Reed and Gamble, 1988 (source 21 of 54)
    Reed, B.L., and Gamble, B.M., 1988, Preliminary geologic map of the Lime Hills quadrangle, Alaska:.

    This is part of the following larger work.

    Gamble, G.M., Allen, M.S., McCammon, R.B., Root, D.H., Scott, W.A., Griscom, Andrew, Krohn, M.D., Ehmann, W.J., and Southworth, S.C., 1988, Lime Hills quadrangle, Alaska -- An AMRAP planning document: U.S. Geological Survey Administrative Report.

    Other_Citation_Details: 167 p., 22 plates
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    The line work and attributes on the western half of the map are base on Reed and Gamble, 1988
    Bundtzen, 1997 (source 22 of 54)
    Bundtzen, T.K., Unpublished material, working compilation map.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Source used in the compilation of the west half of the quadrangle
    Patton and others, 1980 (source 23 of 54)
    Patton, W.W., Jr., Moll, E.J., Dutro, J.T., Jr., Silberman, M.L., and Chapman, R.M., 1980, Preliminary geologic map of the Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811A.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Majority of the line work and attributes are based from Patton and others, 1980
    Bundtzen and others, 1997 (source 24 of 54)
    Bundtzen, T.K., Pinney, D.S., and Laird, G.M., 1997, Preliminary geologic map and data table from the Ophir C-1 and western Medfra C-6 quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 97-46.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: western Medfra C-6 quad
    Bundtzen and others, 1997 (source 25 of 54)
    Bundtzen, T.K.,, Harris, E.E., and Gilbert, W.G., 1997, Geologic map of the eastern half of the McGrath quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 97-14a.

    Type_of_Source_Media: magnetic tape
    Source_Scale_Denominator: 125000
    Source_Contribution:
    Half of the line work and attributes are based from Bundtzen and others, 1997
    Bundtzen, 1997 (source 26 of 54)
    Bundtzen, T.K., Unpublished material, Draft compilation of the western half of the McGrath quadrangle, Alaska.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    The western half of the quadrangle is based on Bundtzen, 1997
    Nokleberg and others, 1992 (source 27 of 54)
    Nokleberg, W.J., Aleinikoff, J.N.,, Lange, I.M., Silva, S.R., Miyaoka, R.T., Schwab, C.E., and Zehner, R.E., 1992, Preliminary geologic map of the Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Open-File Report OFR 92-594.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Majority of the line work and attributes are based from Nokleberg and others, 1992
    Csejtey, 1993 (source 28 of 54)
    Csejtey, Bela, Unpublished material, map compilation.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Majority of the line work and attributes is based from Csejtey, 1993
    Gilbert, 1979 (source 29 of 54)
    Gilbert, W.G., 1979, A geologic guide to Mount McKinley National Park: Alaska Natural History Association, in cooperation with the National Park Service, U.S. Department of the Interior.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: Geologic unit descriptions are based on Gilbert, 1979
    Reed, 1961 (source 30 of 54)
    Reed, J.C., Jr., 1961, Geology of the Mount McKinley quadrangle, Alaska: U.S. Geological Survey Bulletin 1108-A.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: A minor portion of the data is from Reed, 1961
    Patton and others, 1978 (source 31 of 54)
    Patton, W.W., Jr., Miller, T.P., Chapman, R.M., and Yeend, Warren, 1978, Geologic map of the Melozitna quadrangle, Alaska: U.S. Geological Survey Geologic Investigations Series Map I-1071.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Almost all the line work and attributes are based from Patton and others, 1978
    Patton, 1994 (source 32 of 54)
    Patton, W.W., Jr., 1994 personal communication, working compilation map.

    Type_of_Source_Media: stable-base material
    Source_Scale_Denominator: 500000
    Source_Contribution:
    Most of the line work and attributes are based from Patton, 1994
    Chapman and others, 1985 (source 33 of 54)
    Chapman, R.M., Patton, W.W., Jr., and Moll, E.J., 1985, Reconnaissance geologic map of the Ophir quadrangle, Alaska: U.S. Geological Survey Open-File Report 85-203.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Approximately 85% of the line work and attributes are based from Chapman and others, 1985
    Chapman and others, 1982 (source 34 of 54)
    Chapman, R.M., Patton, W.W., Jr., and Moll, E.J., 1982, Preliminary summary of geology in eastern part of Ophir quadrangle: U.S. Geological Survey Circular 844.

    This is part of the following larger work.

    Coonrad, W.L. (ed.), 1982, The United States Geological Survey in Alaska: Accomplishments during 1980: U.S. Geological Survey Circular 844.

    Type_of_Source_Media: paper
    Source_Contribution:
    Approximately 15% of the linework and attributes are based on Chapman and others, 1982
    Cass, 1959 (source 35 of 54)
    J.T., Cass., 1959, Reconnaissance geologic map of the Ruby quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map Map I-289.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Approximately 60% of the line work and attributes are based from Cass, 1959
    Chapman and Patton, 1979 (source 36 of 54)
    Chapman, R.M., and Patton, W.W., Jr., 1979, Two upper Paleozoic rock units identified in southwestern part of the Ruby quadrangle: U.S. Geological Survey Circular 804-B.

    This is part of the following larger work.

    Johnson, K.M. (ed.), and Williams, J.R. (ed.), 1979, The United States Geological Survey in Alaska: Accomplishments during 1978: U.S. Geological Survey Circular 804-B.

    Type_of_Source_Media: paper
    Source_Contribution:
    Approximately 10% of the linework and attributes are based from Chapman and Patton, 1979.
    Chapman and Patton, 1978 (source 37 of 54)
    Chapman, R.M., and Patton, W.W., 1978, Preliminary summary of the geology in the northwest part of the Ruby quadrangle: U.S. Geological Survey Circular 772-B.

    This is part of the following larger work.

    Johnson, K.M. (ed.), 1979, The United States Geological Survey in Alaska: Accomplishments during 1977: U.S. Geological Survey Circular 772-B.

    Type_of_Source_Media: paper
    Source_Contribution:
    Approximately 10% of the linework and attributes are based from Chapman and Patton, 1978
    Puchner, 1997 (source 38 of 54)
    Puchner, C.S., 1997, unpublished material, unpublished Anaconda field mapping of the western part of Ruby quadrangle.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Approximately 20% of the line work and attributes are based from Puchner, 1997
    Dusel-Bacon and others, 1989 (source 39 of 54)
    Dusel-Bacon, Cynthia, Brosge, W.P., Till, A.B., Doyle, E.O., Mayfield, C.F., Reiser, H.N., and Miller, T.P., 1989, Distribution, facies, ages, and proposed tectonic associations of regionally metamorphosed rocks in northern Alaska: U.S. Geological Survey Professional Paper 1497-A.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 1000000
    Source_Contribution:
    Data in the northeastern portion of the map are based on Dusel-Bacon and others, 1989
    Silberman and others, 1979 (source 40 of 54)
    Silberman, M.L., Moll, E.J., Patton, W.W., Jr., Chapman, R.M., and Conner, C.L., 1979, PreCambrian age of metamorphic rocks from the Ruby province, Medfra and Ruby quadrangles--preliminary evidence from radiometric age data: U.S. Geological Survey Circular 804-B.

    This is part of the following larger work.

    Johnson, K.M. (ed.), and Williams, J.R. (ed.), 1979, The United States Geological Survey in Alaska: Accomplishments during 1978: U.S. Geological Survey Circular 804-B.

    Type_of_Source_Media: paper
    Source_Contribution:
    The radiometric age of a pluton was based on Silberman and others, 1979
    Miller and others, 1989 (source 41 of 54)
    Miller, M.L., Belkin, H.E., Blodgett, R.B., Bundtzen, T.K., Cady, J.W., Goldfarb, R.J., Gray, J.E., McGimsey, R.G., and Simpson, S.L., 1989, Pre-field study and mineral resource assessment of the Sleetmute quadrangle, southwestern Alaska: U.S. Geological Survey Open-File Report 89-363.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Approximately 75% of the line work and attributes are based from Miller and others, 1989
    Bundtzen and others, 1993 (source 42 of 54)
    Bundtzen, T.K., Laird, G.M., Harris, E.E., Kline, J.T., and Miller, M.L., 1993, Geologic map of the Sleetmute C-7, D-7, C-8, and D-8 quadrangles, Horn Mountains area, southwest Alaska: Alaska Division of Geological and Geophysical Surveys Public-Data File PDF 93-47.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution:
    Approximately 25% of the linework and attributes are based on Bundtzen and others, 1993
    Csejtey and others, 1978 (source 43 of 54)
    Csejtey, Bela, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A., Smith, J.G., and Silberman, M.L., 1978, Reconnaissance geologic map and geochronology, Talkeetna Mountains quadrangle, northern part of Anchorage quarangle, and southwestern corner Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558A.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Approximately 95% of the area covered is based on Csejtey and others, 1978.
    Kline and others, 1990 (source 44 of 54)
    Kline, J.T., Bundtzen, T.K., and Smith, T.E., 1990, Preliminary bedrock geologic map of the Talkeetna Mountians D-2 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 90-24.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution:
    Approximately 5% of the map area is base on Kline and others, 1990
    Reed and Nelson, 1980 (source 45 of 54)
    Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1174.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    95% of line work and attributes are based from Reed and Nelson, 1980
    Dover, 1997 (source 46 of 54)
    Dover, J.H., Unpublished material, working compilation.

    Type_of_Source_Media: stable-base material
    Source_Scale_Denominator: 250000
    Source_Contribution: 99% of line work and attributes are based from Dover, 1997
    Reifenstuhl and others, 1998 (source 47 of 54)
    Reifenstuhl, R.R., Dover, J.H., Newberry, R.J., Clautice, K.H., Liss, S.A., Blodgett, R.B., and Weber, F.R., 1998, Geologic map of the Tanana A-1 and A-2, central Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 98-37a.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution:
    A minor portion of the linework and attributes are based on Reifenstuhl and others, 1998
    Reifenstuhl and others, 1997 (source 48 of 54)
    Reifenstuhl, R.R., Dover, J.H., Pinney, D.S., Newberry, R.J., Clautice, K.H., Liss, S.A., Blodgett, R.B., Bundtzen, T.K., and Weber, F.R., 1997, Geologic map of the Tanana B-1 quadrangle, central Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 97-15a.

    Type_of_Source_Media: map
    Source_Scale_Denominator: 63360
    Source_Contribution:
    A minor portion of the linework and attributes are based on Reifenstuhl and others, 1997
    Magoon and others, 1976 (source 49 of 54)
    Magoon, L.B., Adkison, W.L., and Egbert, R.M., 19761992, Map showing geology, wildcat wells, Tertiary plant localities, K/Ar age dates, and petroleum operations, Cook Inlet area, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1019.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Approximately a third of the line work and attributes are based from Magoon and others, 1976
    Reed and Elliott, 1970 (source 50 of 54)
    Reed, B.L., and Elliott, R.L., 1970, Reconnaissance geologic map, analyses of bedrock and stream sediment samples, and an aeromagnetic map of parts of the southern Alaska Range: U.S. Geological Survey Open-File Report OFR 70-271.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution:
    Approximately a third of the line work and attributes are based on Reed and Elliott, 1970.
    Solie and others, 1991 (source 51 of 54)
    Soile, D.N., Gilbert, W.G., Harris, E.E., Kline, J.T., Liss, S.A., and Robinson, M.S., 1991, Preliminary geologic map of Tyonek D-6 and eastern Tyonek D-7 quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 91-10.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution:
    Less than 10% of the linework and attributes are base on Solie and others, 1991
    Haeussler, 1997 (source 52 of 54)
    Haeussler, P.J., 1997, unpublished material, work compilation.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Approximately 25% of the linework and attributes are base on Haeussler, 1997
    Winkler and others, 1981 (source 53 of 54)
    Winkler, G.R., Silberman, M.L., Grantz, Arthur, Miller, R.J., and MacKevett, E.M., Jr., 1981, Geologic map and summary geochronology of the Valdez quadrangle, southern Alaska: U.S. Geological Survey Open-File Report 81-892-A.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Majority of line work and attributes are based from Winkler and others, 1981
    Winkler, 1997 (source 54 of 54)
    Winkler, G.R., 1997, unpublished material, working compilation.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Winkler, 1997, provided updates and corrections to Winkler and others, 1981
  2. How were the data generated, processed, and modified?
    Date: 1998 (process 1 of 2)
    Linework was captured by hand digitizing from a paper map. The linework was edited and attributed using ARC/Info. The coverage was cleaned, built for polygons, and had labels created and attributed. For the purpose of distribution, the coverage has been converted to an interchange format file using the ARC/Info export command. This procedure was used for the following quadrangles: 
    coverage quadrangle
ancomp   Anchorage
bdcomp   Big Delta
cicomp   Circle
fbcomp   Fairbanks
hecomp   Healy
idcomp   Iditarod
khcomp   Kantishna River
mdcomp   Medfra
mmcomp   Mount McKinley
mzcomp   Melozitna
smcomp   Sleetmute
tkcomp   Talkeetna Mountains
tlcomp   Talkeetna
tycomp   Tyonek
vacomp   Valdez
    Other quadrangles were compiled with procedures that differed slightly. In all cases processing by USGS was carried out primarily using ARC/Info as described above. 
    rbcomp   Ruby
    The data from Cass, 1959; Chapman and Patton, 1979; and Chapman and Patton, 1978 had to be transcribed to 1:250,000 scale paper topographic maps for digitizing. 
    opcomp   Ophir
    The data from Chapman and others, 1982 was transcribed to a paper topographic map and then digitized. 
    tncomp   Tanana
    Linework was captured by hand digitizing from a stabe-base and paper maps. 
    lgcomp   Livengood
    Linework was captured by hand digitizing from a stable based map. 
    nlcomp   Nulato
    Linework was captured by hand digitizing from a stable based map. 
    lhcomp   Lime Hills
    Linework was captured by hand digitizing from paper and stable- base maps. 
    mhcomp   Mount Hayes
    Linework was converted from a 1996 CAD DXF file. 
    gucomp   Gulkana
    Linework was vectorized from a CAD DXF file. 
    mgcomp   McGrath
    For the western half of the coverage, the linework was captured by hand digitizing from a paper map. The eastern half of the coverage was obtained from ADGGS. The file structure was converted and the two coverages were merged.
    Date: 29-Sep-1998 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    USGS Mineral Resources Program - Alaska Section
    Attn: Nora B. Shew
    Geologist
    4200 University Drive
    Anchorage, AK
    USA

    907-561-1181 (voice)
    907-786-7401 (FAX)
    nshew@usgs.gov
  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    The linework was captured by hand digitizing from a 1:250,000 scale paper map. The arc and polygon attributes are based on the published thematic map. Linework for two-side rivers, shoreline, ice contacts were hand digitized from a 1:250,000 scale paper topographic map. The data source of each feature is coded in the attribute table. Accuracy of the data capture was evaluated by visual checks against the original publication by a person other than the person who captured the data.
    This thematic bedrock map depicts geologic units present beneath soil or relatively thin mantles of surficial deposits, not necessarily the surficial materials themselves.
    Attributes of the polygons provide coding keyed to the original units of the source map, and coding keyed to the generalized geologic units for the compilation of which this map is only a small part of.
  2. How accurate are the geographic locations?
    Users of this digital geologic map should respect the intentions of the original mappers and the map compilers, and the limitations of the map. The Anchorage geologic map is intended to be used at a scale of 1:250,000; it is not intended to be used at a more detailed scale.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This digital map differs from the original published geologic map in several ways. The digital version does not include topography, structural fold axes, annotation, strike and dip symbols, or locations of fossils or geochronlogy samples.
  5. How consistent are the relationships among the observations, including topology?
    This coverage is a net coverage containing arcs and polygons. Each polygon has a class attribute classifying bedrock, surficial deposit, or water/ice body. Faults and stratigraphic contacts are represented as arcs. When a fault is also a stratigraphic contact, only a single arc is present. Dangling arcs may be present (faults, dikes, crater rim, etc.)

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None
Use_Constraints:
Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    USGS Information Services
    Box 25286
    Denver Federal Center
    Denver, CO
    USA

    303-202-4200 or 1-888-ASK-USGS (voice)
    303-202-4693 (FAX)
  2. What's the catalog number I need to order this data set?
  3. What legal disclaimers am I supposed to read?
    This Compact Disc-Read Only Memory (CD-ROM) publication was prepared by an agency of the United States Government. Neither the United States Government nor the agency thereof nor any of their employees make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, reommendation, or favoring by the United States Government or any agency thereof.
    Although all data and software published on this CD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data, software, or related materials.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 10-Jun-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA
USA

703-648-6533 (voice)
703-648-6252 (FAX)
pschweitzer@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:
This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/98-133/a/metadata.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:07:07 2018