Geologic map of the Storm King Mountain quadrangle, Garfield County, Colorado

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Frequently anticipated questions:

What does this data set describe?

Title:
Geologic map of the Storm King Mountain quadrangle, Garfield County, Colorado
Abstract:
New 1:24,000-scale geologic mapping in the Storm King Mountain 7.5' quadrangle, in support of the USGS Western Colorado I-70 Corridor Cooperative Geologic Mapping Project, provides new data on the structure on the south margin of the White River uplift and the Grand Hogback and on the nature, history, and distribution of surficial geologic units.
Rocks ranging from Holocene to Proterozoic in age are shown on the map. The Canyon Creek Conglomerate, a unit presently known to only occur in this quadrangle, is interpreted to have been deposited in a very steep sided local basin formed by dissolution of Pennsylvanian evaporite late in Tertiary time. At the top of the Late Cretaceous Williams Fork Formation is a unit of sandstone, siltstone, and claystone from which Late Cretaceous palynomorphs were obtained in one locality. This interval has been mapped previously as Ohio Creek Conglomerate, but it does not fit the current interpretation of the origin of the Ohio Creek. Rocks previously mapped as Frontier Sandstone and Mowry Shale are here mapped as the lower member of the Mancos Shale and contain beds equivalent to the Juana Lopez Member of the Mancos Shale in northwestern New Mexico. The Pennsylvanian Eagle Valley Formation in this quadrangle grades into Eagle Valley Evaporite as mapped by Kirkham and others (1997) in the Glenwood Springs area.
The Storm King Mountain quadrangle spans the south margin of the White River uplift and crosses the Grand Hogback monocline into the Piceance basin. Nearly flat lying Mississippian through Cambrian sedimentary rocks capping the White River uplift are bent into gentle south dips and broken by faults at the edge of the uplift. South of these faults the beds dip moderately to steeply to the south and are locally overturned. These dips are interrupted by a structural terrace on which are superposed numerous gentle minor folds and faults. This terrace has an east-west extent similar to that of the Canyon Creek Conglomerate to the north. We interpret that the terrace formed by movement of Eagle Evaporite from below in response to dissolution and diapirism in the area underlain by the conglomerate. A low-angle normal fault dipping gently north near the north margin of the quadrangle may have formed also in response to diapirism and dissolution in the area of the Canyon Creek Conglomerate. Along the east edge of the quadrangle Miocene basalt flows are offset by faults along bedding planes in underlying south-dipping Cretaceous rocks, probably because of diapiric movement of evaporite into the Cattle Creek anticline (Kirkham and Widmann, 1997).
Steep topography and weak rocks combine to produce a variety of geologic hazards in the quadrangle.
Supplemental_Information:
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 
Although this Federal Geographic Data Committee-compliant
metadata file is intended to document the data set in
nonproprietary form, as well as in ARC/INFO format, this
metadata file may include some ARC/INFO-specific terminology.
FILES INCLUDED IN THIS DATA SET:
skmpoly: polygon coverage containing geologic unit contacts,
         faults, and labels.
skmline: arc coverage containing fold axes, lines of cross-
         sections, and other linear map entities.
skmpnt:  point coverage containing strike and dip attitudes
         of bedding and foliation, and other point-data map
         entities.
  1. How might this data set be cited?
    Bryant, Bruce, Shroba, Ralph R., Harding, Anne E., and Murray, Kyle E., 2002, Geologic map of the Storm King Mountain quadrangle, Garfield County, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-2389, U.S. Geological Survey, Denver, Colorado.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -107.5
    East_Bounding_Coordinate: -107.375
    North_Bounding_Coordinate: 39.625
    South_Bounding_Coordinate: 39.5
  3. What does it look like?
    http://pubs.usgs.gov/mf/2002/mf-2389/mf-2389.gif (GIF)
    Reduced-size image of the map sheet, 250x283 pixels, 38k bytes.
    http://pubs.usgs.gov/mf/2002/mf-2389/mf-2389_map.pdf (PDF)
    Printable representation of map layout, 2.7 megabytes
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2002
    Currentness_Reference:
    publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Map and GIS database
  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. It contains the following vector data types (SDTS terminology):
      • Point
      • String
      • GT-polygon composed of chains
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 13
      Transverse_Mercator:
      Longitude_of_Central_Meridian: -105.0
      Scale_Factor_at_Central_Meridian: 0.9996
      Latitude_of_Projection_Origin: 0
      False_Easting: 500000
      False_Northing: 0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 1.4166052
      Ordinates (y-coordinates) are specified to the nearest 1.4166052
      Planar coordinates are specified in Meters
      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
  7. How does the data set describe geographic features?
    POLYGONGONAL FEATURES OF THE GEOLOGIC DATA
    Geologic units and other land-cover polygonal features. (Source: USGS Central Earth Surface Processes Team convention)
    SYMBOL
    Integer index of the fill color for this polygon. The index indicates an element of the shade set color524.shd. (Source: USGS Central Earth Surface Processes Team convention)
    Formal codeset
    Codeset Name:Shadeset from supplied file
    Codeset Source:color524.shd
    LABEL
    Map unit label. This is a character field of width 17. The typeface used is fnt027, included with this package. Some geologic map units are labeled using symbols that are not represented in standard type faces, such as the symbols for the Cambrian, Pennsylvanian, and Triassic periods. The font fnt027, included with the ArcInfo export files in this database package, is used to draw these symbols. (Source: USGS Central Earth Surface Processes Team convention)
    TEXT
    Map-unit label expressed in the nearest ASCII equivalent of the unit label that is actually shown on the printed map sheet. Some geologic unit labels contain symbols that cannot be represented using ASCII, such as the symbols for the Cambrian, Pennsylvanian, and Triassic periods. The proper symbols are contained within the font file fnt027. (Source: USGS Central Earth Surface Processes Team convention)
    ValueDefinition
    QswSheetwash deposits
    QtoOlder terrace alluvium
    afartificial fill
    QtaTalus deposits
    QloLoess
    QcColluvium
    QtiTill
    QttOldest terrace alluvium
    QdyYounger debris-flow deposits
    QlsLandslide deposits
    KwWilliams Fork Formation
    QacUndivided alluvium and colluvium
    Qlo/QpLoess and pediment deposits
    Qlo/QtyLoess and younger terrace alluvium
    QTdOldest debris-flow deposits
    QfyYounger fan alluvium and debris-flow deposits
    QfoOlder fan alluvium and debris-flow deposits
    Qlo/QttLoess and oldest terrace alluvium
    CsSawatch Quartzite
    TccConglomerate of Canyon Creek
    Qlo/QfoLoess, older fan alluvium and debris-flow deposits
    XgGranodiorite gneiss
    TwuUpper member Wasatch Formation
    DcpParting Formation
    OCuManitou Dolomite and Dotsero Formation, undivided
    TKuUndivided unit
    TgyYounger gravel
    TgoOlder gravel
    TbBasalt and trachybasalt
    CdDotsero Formation
    TwlLower member Wasatch Formation
    DcChaffee Group
    DcdDyer Formation
    PeEagle Valley Formation
    PeeEagle Valley Evaporite
    Colorado RiverColorado River
    Porter ReservoirPorter Reservoir
    PmsSchoolhouse Member Maroon Formation
    PPmMain body Maroon Formation
    MlLeadville Limestone
    PmlLower member Maroon Formation
    JeEntrada Sandstone
    TRPsState Bridge Formation
    KmlLower member Mancos Shale
    KicCozzette and Corcoran Sandstone members Iles Formation
    KiMain body Iles Formation
    KsSandstone, siltstone, claystone, and conglomerate
    JmMorrison Formation
    QfpFlood-plain and stream- channel deposits
    KmnNiobrara member Mancos Shale
    QdoOlder debris-flow deposits
    QpPediment deposit
    KdDakota Sandstone
    XfFelsic gneiss
    KmuUpper member Mancos Shale
    Qlo/QtoLoess and older terrace alluvium
    TRcChinle Formation
    PbBelden Formation
    MDuLeadville Limestone and Chaffee Group, undivided
    DESCRIPTION
    Short textual description of the map unit. Complete descriptions of the map units are normally provided in an accompanying report. This description is typically shown on the legend printed on the map sheet. (Source: USGS Central Earth Surface Processes Team convention) Self-explanatory text description
    LINEAR FEATURES OF THE GEOLOGIC DATA
    Linear geologic features bounding geologic unit polygons, chiefly contacts and faults. (Source: USGS Central Earth Surface Processes Team convention)
    DESCRIPTION
    Text indicating the type of linear geologic feature. (Source: Central Earth Surface Processes Team convention)
    Formal codeset
    Codeset Name:Appendix A, Sections 1 and 2, Description text field.
    Codeset Source:Digital Cartographic Standard for Geologic Map Symbolization (U.S. Geological Survey Open-File Report 99-430).
    SYMBOL
    Integer index of the line type used for plotting the feature on the map. The line type is given by the symbol set (whose name is specified in an accompanying attribute) and this index value. (Source: USGS Central Earth Surface Processes Team convention) numerous integer values
    SYMSET
    Name of the symbol set containing the appropriate line style to be used for plotting this feature. (Source: USGS Central Earth Surface Processes Team convention) various symbol sets
    FEATURES OF THE GEOLOGIC LINE DATA
    Linear geologic features, chiefly fold axes, moraine crest lines, and lines of cross section, that do not bound the geologic unit polygons. (Source: USGS Central Earth Surface Processes Team convention)
    DESCRIPTION
    Text indicating the type of linear geologic feature. (Source: USGS Central Earth Surface Processes Team convention)
    Formal codeset
    Codeset Name:Appendix A, Description text field for linear features.
    Codeset Source:Digital Cartographic Standard for Geologic Map Symbolization (U.S. Geological Survey Open-File Report 99-430).
    SYMBOL
    Integer index of the line type used for plotting the feature on the map. The line type is given by the symbol set (whose name is specified in an accompanying attribute) and this index value. (Source: USGS Central Earth Surface Processes Team convention) integers referring to symbols from a symbol set
    SYMSET
    Name of the symbol set containing the appropriate line style to be used for plotting this feature. (Source: USGS Central Earth Surface Processes Team convention) file name
    FEATURES OF THE GEOLOGIC POINT DATA
    Point geologic features of all types, including observations and measurements of geologic structure, geodetic control points, mineral and fossil occurrences, small geologic structures, and relevant manmade features. (Source: USGS Central Earth Surface Processes Team convention)
    DESCRIPTION
    Text indicating the type of geologic point feature. (Source: USGS Central Earth Surface Processes Team convention)
    Formal codeset
    Codeset Name:Appendix A, Description text field for point features.
    Codeset Source:Digital Cartographic Standard for Geologic Map Symbolization (U.S. Geological Survey Open-File Report 99-430).
    SYMBOL
    Integer index of the point type used for plotting the feature on the map. The point type is given by the symbol set (whose name is specified in an accompanying attribute) and this index value. (Source: USGS Central Earth Surface Processes Team convention) integers referring to symbols from a symbol set
    SYMSET
    Name of the symbol set containing the appropriate symbol to be used for plotting this feature. (Source: USGS Central Earth Surface Processes Team convention) file name
    Entity_and_Attribute_Overview:
    The data files were generated using ArcInfo, consequently they contain a number of fields that are created and maintained specifically for that software package. The actual field characteristics are as follows: 
    Polygonal features of the geologic data in SKMPOLY.PAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC
    1  AREA                   8    18     F      5
    9  PERIMETER              8    18     F      5
   17  SKMPOLY#               4     5     B      -
   21  SKMPOLY-ID             4     5     B      -
   25  SYMBOL                 8     8     I      -
   33  LABEL                 17    17     C      -
   50  TEXT                  17    17     C      -
   67  DESCRIPTION           64    64     C      _

Linear features of the geologic unit data in SKMPOLY.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC
    1  FNODE#                 4     5     B      -
    5  TNODE#                 4     5     B      -
    9  LPOLY#                 4     5     B      -
   13  RPOLY#                 4     5     B      -
   17  LENGTH                 8    18     F      5
   25  SKMPOLY#               4     5     B      -
   29  SKMPOLY-ID             4     5     B      -
   33  DESCRIPTION           80    80     C      -
  113  SYMBOL                 3     3     I      -
  116  SYMSET                10    10     C      -

Features of the geologic line data in SKMLINE.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC
    1  FNODE#                 4     5     B      -
    5  TNODE#                 4     5     B      -
    9  LPOLY#                 4     5     B      -
   13  RPOLY#                 4     5     B      -
   17  LENGTH                 8    18     F      5
   25  SKMLINE#               4     5     B      -
   29  SKMLINE-ID             4     5     B      -
   33  DESCRIPTION           80    80     C      -
  113  SYMBOL                 3     3     I      -
  116  SYMSET                10    10     C      -

Features of the geologic point data in SKMPNT.PAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC
    1  AREA                   8    18     F      5
    9  PERIMETER              8    18     F      5
   17  SKMPNT#                4     5     B      -
   21  SKMPNT-ID              4     5     B      -
   25  DESCRIPTION           80    80     C      -
  105  SYMBOL                 3     3     I      -
  108  STRIKE                 3     3     I      -
  111  DIP                    3     3     I      -
  114  SYMSET                10    10     C      -
  124  DETAILS               50    50     C      -
    Field values in this database commonly occur in combinations that are described by the following table. FREQUENCY here represents the number of occurrences within the data of the combination of field values shown. Characters in the LABEL field are used to signify special geologic symbols, # signifies Triassic, @ signifies Pennsylvanian, and { signifies Cambrian. 
     Field value combinations in SKMPOLY.PAT
 FREQUENCY SYMBOL LABEL            TEXT             DESCRIPTION
 14        4      Qsw              Qsw              Sheetwash deposits
 13        5      Qto              Qto              Older terrace alluvium
 17        8      af               af               artificial fill
 24        9      Qta              Qta              Talus deposits
 2         10     Qlo              Qlo              Loess
 100       12     Qc               Qc               Colluvium
 37        13     Qti              Qti              Till
 5         14     Qtt              Qtt              Oldest terrace alluvium
 4         15     Qdy              Qdy              Younger debris-flow deposits
 53        16     Qls              Qls              Landslide deposits
 11        18     Kw               Kw               Williams Fork Formation
 82        25     Qac              Qac              Undivided alluvium and colluvium
 2         28     Qlo/Qp           Qlo/Qp           Loess and pediment deposits
 4         29     Qlo/Qty          Qlo/Qty          Loess and younger terrace alluvium
 4         30     QTd              QTd              Oldest debris-flow deposits
 42        32     Qfy              Qfy              Younger fan alluvium and debris-flow deposits
 5         33     Qfo              Qfo              Older fan alluvium and debris-flow deposits
 1         34     Qlo/Qtt          Qlo/Qtt          Loess and oldest terrace alluvium
 17        41     {s               Cs               Sawatch Quartzite
 13        47     Tcc              Tcc              Conglomerate of Canyon Creek
 7         52     Qlo/Qfo          Qlo/Qfo          Loess, older fan alluvium and debris-flow deposits
 4         64     Xg               Xg               Granodiorite gneiss
 19        71     Twu              Twu              Upper member Wasatch Formation
 7         91     Dcp              Dcp              Parting Formation
 21        101    O{u              OCu              Manitou Dolomite and Dotsero Formation, undivided
 7         104    TKu              TKu              Undivided unit
 2         107    Tgy              Tgy              Younger gravel
 2         108    Tgo              Tgo              Older gravel
 9         130    Tb               Tb               Basalt and trachybasalt
 1         143    {d               Cd               Dotsero Formation
 7         156    Twl              Twl              Lower member Wasatch Formation
 8         168    Dc               Dc               Chaffee Group
 8         177    Dcd              Dcd              Dyer Formation
 27        241    @e               Pe               Eagle Valley Formation
 13        243    @ee              Pee              Eagle Valley Evaporite
 1         313    Colorado River   Colorado River   Colorado River
 1         313    Porter Reservoir Porter Reservoir Porter Reservoir
 16        316    Pms              Pms              Schoolhouse Member Maroon Formation
 9         320    P@m              PPm              Main body Maroon Formation
 16        323    Ml               Ml               Leadville Limestone
 8         327    @ml              Pml              Lower member Maroon Formation
 14        365    Je               Je               Entrada Sandstone
 14        372    #Ps              TRPs             State Bridge Formation
 12        387    Kml              Kml              Lower member Mancos Shale
 13        398    Kic              Kic              Cozzette and Corcoran Sandstone members Iles Formation
 11        401    Ki               Ki               Main body Iles Formation
 5         411    Ks               Ks               Sandstone, siltstone, claystone, and conglomerate
 10        427    Jm               Jm               Morrison Formation
 11        429    Qfp              Qfp              Flood-plain and stream- channel deposits
 15        442    Kmn              Kmn              Niobrara member Mancos Shale
 34        444    Qdo              Qdo              Older debris-flow deposits
 1         451    Qp               Qp               Pediment deposit
 8         454    Kd               Kd               Dakota Sandstone
 4         476    Xf               Xf               Felsic gneiss
 27        483    Kmu              Kmu              Upper member Mancos Shale
 1         500    Qlo/Qto          Qlo/Qto          Loess and older terrace alluvium
 18        510    #c               TRc              Chinle Formation
 5         515    @b               Pb               Belden Formation
 1         524    MDu              MDu              Leadville Limestone and Chaffee Group, undivided
 Field value combinations in SKMPOLY.AAT
 FREQUENCY   SYMBOL      SYMSET      DESCRIPTION
 2           1           geol_sfo    Wheeler coal bed-certain
 1768        1           geol_sfo    Contact-certain
 4           3           geol_sfo    Wheeler coal bed-approximately located
 39          3           geol_sfo    Contact-approximately located
 13          15          geol_sfo    Thrust fault-certain
 1           23          geol_sfo    Thrust fault-approximately located
 9           25          geol_sfo    Thrust fault-concealed
 100         51          geol_sfo    Normal fault-certain
 2           59          geol_sfo    Clinkered Wheeler coal bed-certain
 16          185         geol_sfo    Normal fault-approximately located
 109         186         geol_sfo    Normal fault-concealed
 29          190         geol_sfo    Strike-slip fault, right-lateral located offset-concealed
 47          222         geol_sfo    Water boundary
 28          225         alcwrg      Intrusive contact-certain
 216         227         geol_sfo    Map boundary
 42          229         alcwrg      Intrusive contact-concealed
 Field value combinations in SKMLINE.AAT
 FREQUENCY   SYMBOL      SYMSET      DESCRIPTION
 9           60          geol_sfo    Anticline-certain
 2           63          geol_sfo    Anticline-concealed
 14          164         geol_sfo    Crest line of moraine, sense of symmetry unspecified
 1           94          geol_sfo    Syncline-approximately located
 18          92          geol_sfo    Syncline-certain
 10          95          geol_sfo    Syncline-concealed
 1           227         geol_sfo    cross-section line A
 1           227         geol_sfo    cross-section line B
 Field value combinations in SKMPNT.PAT
 FREQUENCY   SYMBOL      SYMSET      DESCRIPTION
 3           22          water2      Dry hole-unsuccessful hole drilled during hydrocarbon exploration
 5           1           geoscamp2   Horizontal bedding
 7           7           alcgeol     Inclined bedding-showing approximate strike and dip
 483         2           geoscamp2   Inclined bedding-showing strike and dip
 16          103         usgs        Inclined tunnel or adit
 44          6           geoscamp2   Overturned bedding-showing strike and dip
 1           9           usgs2       Prospect pit
 3           81          geoscamp2   Strike and dip of foliation
 1           70          geoscamp2   Strike and dip of inclined foliation where layering is parallel to foliation
 1           71          geoscamp2   Strike of vertical foliation where layering is parallel to foliation
 7           4           geoscamp2   Vertical bedding-showing strike
 1           53          plotter     Fossil locality
    Entity_and_Attribute_Detail_Citation: http://pubs.usgs.gov/mf/2002/mf-2389/mf-2389_pam_508.pdf

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Bruce Bryant
    • Ralph R. Shroba
    • Anne E. Harding
    • Kyle E. Murray
  2. Who also contributed to the data set?
    Bedrock geology mapped by Bruce Bryant, 1995-1997. Surficial geology mapped by Ralph R. Shroba, 1992-1993. Digitized by Anne E. Harding, 1997-1998. Conversion to ARC/INFO format and preparation of metadata by Kyle E. Murray, 2000-2002
  3. To whom should users address questions about the data?
    Bruce Bryant
    U.S. Geological Survey
    Geologist
    U.S. Geological Survey MS 913 Denver Federal Center
    Lakewood, CO
    USA

    303-236-1234 (voice)
    bbryant@usgs.gov

Why was the data set created?

Update and reinterpret earlier geologic mapping, and provide sufficient geologic information for land-use decisions.

How was the data set created?

  1. From what previous works were the data drawn?
    Fairer and others (1993) (source 1 of 2)
    Fairer, G.M., Green, M.W., and Shroba, R.R., 1993, Preliminary geologic map of the Storm King Mountain quadrangle, Garfield County, Colorado: U.S. Geological Survey Open-File Report 93-320, U.S. Geological Survey, Denver, Colorado.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 24000
    Source_Contribution: preliminary geologic information
    Bryant and others (1998) (source 2 of 2)
    Bryant, Bruce, Shroba, R.R., and Harding, A.E., 1998, Revised preliminary geologic map of the Storm King Mountain quadrangle, Garfield County, Colorado: U.S. Geological Survey Open-File Report 98-472, U.S. Geological Survey, Denver, Colorado.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 24000
    Source_Contribution: Preliminary revision of the map
  2. How were the data generated, processed, and modified?
    Date: 1998 (process 1 of 9)
    Field mapping and air photo interpretation culminating in a preliminary revision of the map Data sources used in this process:
    • Fairer and others (1993)
    Data sources produced in this process:
    • Bryant and others (1998)
    Date: 1997 (process 2 of 9)
    The geologic database was digitized using the GSMCAD public domain program (USGS Open-File Report 96-007).
    Date: 2000 (process 3 of 9)
    The database was exported from GSMCAD to Arc GENERATE ASCII files.
    Date: 2000 (process 4 of 9)
    The gsmarc.aml program (distributed with GSMCAD) was used in ArcInfo to convert the GENERATE files to Arc coverages and build polygons.
    Date: 11-Jan-2000 (process 5 of 9)
    First draft of metadata created by Kyle E. Murray using FGDCMETA.AML ver. 1.32 01/11/99 on ArcInfo data set /data9/kmurray2/stormking/skm24k
    Date: 2001 (process 6 of 9)
    USGS Topographic Base Map data was scanned at 400 dots per inch (dpi), processed in Adobe Photoshop as a bitmap-grayscale image, and then georegistered using ArcInfo software.
    Date: 2001 (process 7 of 9)
    Attributes of ArcInfo coverages were revised to comply with the Public Review Draft - Digital Cartographic Standard for Geologic Map Symbolization published in April 2000 by the Federal Geographic Data Committee.
    Date: 2001 (process 8 of 9)
    Checkplots of the coverages were printed and checked against source materials for accuracy and completeness. The database information was checked visually and digitally using various routines in ArcInfo for accuracy and consistency.
    Date: 19-Aug-2009 (process 9 of 9)
    Creation of original metadata record Person who carried out this activity:
    U.S. Geological Survey
    Attn: Schumann, R. Randall
    MS 913, USGS Box 25046, Denver Federal Center
    Denver, CO
    USA

    303-236-1525 (voice)
    rschumann@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?
    Attributes were checked by manually comparing hardcopy plots of the digital data with the source materials. Authors and USGS map editors performed separate reviews.
  2. How accurate are the geographic locations?
    Geologic contacts and features were plotted from field notes on a topographic mylar base map. Lines were digitized from the base map using a digitizer tablet with resolution of 0.001 inch, and most digitized positions on the map are estimated to have at least 10 m horizontal accuracy. Elevation data that are included in the database are from digital line graph data from 1:24,000-scale 7.5' quadrangles.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the observations, including topology?
    The map was released in preliminary form by Bryant and others (1998), superseding one by Fairer and others (1993) that contained incorrect contacts, faults, and rock unit identifications and lacked structural information. Unfortunately during field work for this revision about 12 percent of the quadrangle, mostly in the southwestern part, was not accessible to us; consequently geologic information for the inaccessible areas was obtained from interpretation of aerial photographs, published reports, and observations from a county road and adjacent areas.
    Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, and other errors by the authors and by the GIS technician(s) that created the digital database. Automated (ARC/INFO) routines were also used to check the databases for polygon label errors, line or point attribution errors, sliver polygons, dangling arcs, intersection errors, and projection information. Check plots of the map were reviewed by two other geologists for consistency with basic geologic principles and general conformity to USGS mapping standards.

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:
These data are intended for use at 1:24,000 scale. Acknowledgment of the USGS would be appropriate in products derived from these data. Any hardcopies utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. User specifically agrees not to misrepresent these data sets, nor to imply that changes were approved by the USGS or the authors of this geologic map database.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    USGS Information Services, Box 25286, Denver Federal Center
    Lakewood, CO

    1-888-ASK-USGS (voice)
  2. What's the catalog number I need to order this data set? USGS Miscellaneous Field Studies Map MF-2389
  3. What legal disclaimers am I supposed to read?
    Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.
    The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 13-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)
This page is <https://geo-nsdi.er.usgs.gov/metadata/map-mf/2389/metadata.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:05:14 2018