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The Geologic Map of Arkansas

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Frequently anticipated questions:


What does this data set describe?

Title: The Geologic Map of Arkansas
Abstract:
This geologic map was prepared as a part of a continuing study of digital methods and techniques as applied to complex geologic maps. The digital geologic map was created from the orginal linework used to prepare the published paper Geologic Map of Arkansas. Consequently, this geologic map database can be queried in many ways to produce a variety of geologic maps. The analog source of data was Haley, B.R.; assisted by Glick, E.E., Bush, W.V., Clardy, B.F., Stone, C.G., Woodward, M.B., and Zachry, D.L., 1993, Geologic Map of Arkansas: U.S. Geol. Survey, Special Geologic Map, scale 1:500,000.
  1. How might this data set be cited?
    Haley, B.R., Queen, James E., and Green, Gregory N., 2000, The Geologic Map of Arkansas: U.S. Geological Survey, Denver, Colorado.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -94.5
    East_Bounding_Coordinate: -89.5
    North_Bounding_Coordinate: 36.5
    South_Bounding_Coordinate: 33.0
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2000Currentness_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?
      The map projection used is Albers Conical Equal Area.
      Projection parameters:
      Standard_Parallel: 33
      Standard_Parallel: 45
      Longitude_of_Central_Meridian: -92.0
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 0
      False_Northing: 0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 50
      Ordinates (y-coordinates) are specified to the nearest 50
      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?
    Entity_and_Attribute_Overview:
    The Digital Arkansas Geologic Map is made of five spatial datasets. The map coverages are (1) contact, thrust, igneous, and fault, and (2) the type coverage. The type coverage contains vectors that are in the shape of words, graphics and symbols. Althought the scanned image was vectorized the text is easly readable.
    The correlation diagram was topologically structrured and attributed as coverage LEGEND1. Consequently the boxes were color filled with the coresponding color from the geologic map. LEGEND2, CULTURE AND DRAINAGE coverages were not attributed. They are supplied as registered graphical background images.
    CODING SCHEME FOR ARC ATTRIBUTES:
    Several polygons and arcs were given the attribute unknown.
    These unknown lines and polygons ouccur along the Mississippi river.
    ITEM            FEATURE
    P1              Shorthand attribute
    COLOR           Line pattern from CARTO.LIN
    NAME            Type of line
    
    Line Types and Attributes
    P1  Color  Name
    -1     0   unknown
     1   101   contacts
     2   128   state borders
     3   203   thrust faults
     4   103   normal faults
     5   107   dotted faults
     6   402   Ki igneous rocks
    
    CODING SCHEME FOR POLYGON ATTRIBUTES:
    
    
    P1  COLOR MAPCODE FORMATION                       SYSTEM         ERA
     -1   0           unknown
    101 133   Qcm     Alluvium                         Quaternary     Cenozoic
    102  71   Qso     Alluvial deposits                Quaternary     Cenozoic
    103 900   Qt      Terrace deposits                 Quaternary     Cenozoic
    104 472   Qds     Dune sand                        Quaternary     Cenozoic
    105 416   Qss     Silt and sand                    Quaternary     Cenozoic
    106  98   Ql      Loess                            Quaternary     Cenozoic
    107   9   Qsg     Sand and gravel                  Quaternary     Cenozoic
    108 133   Qal     Alluvium                         Quaternary     Cenozoic
    109 470   Qat     Alluvium and terrace deposits    Quaternary     Cenozoic
    201 476   Tg      Gravel                           Tertiary       Cenozoic
    202 474   Tj      Jackson Group                    Tertiary       Cenozoic
    203 883   Tc      Claiborne Group                  Tertiary       Cenozoic
    204  10   Tw      Wilcox Group                     Tertiary       Cenozoic
    205   6   Tm      Midway Group                     Tertiary       Cenozoic
    301 702   Ksc     Sand and clay                    Cretaceous     Mesozoic
    302 701   Kr      Cretaceous rocks                 Cretaceous     Mesozoic
    303 659   Kad     Arkadelphia Marl                 Cretaceous     Mesozoic
    304 660   Kn      Nacatoch sand                    Cretaceous     Mesozoic
    305 605   Ks      Saratoga Chalk                   Cretaceous     Mesozoic
    306 356   Km      Marlbrook Marl                   Cretaceous     Mesozoic
    307 606   Ka      Annona Chalk                     Cretaceous     Mesozoic
    308 303   Ko      Ozan Fm                          Cretaceous     Mesozoic
    309 630   Kb      Brownstown Marl                  Cretaceous     Mesozoic
    310  77   Kto     Tokio Fm                         Cretaceous     Mesozoic
    311  17   Kw      Woodbine Fm                      Cretaceous     Mesozoic
    312 808   Kkg     Kiamichi Fm and Goodland Ls      Cretaceous     Mesozoic
    313  14   Kt      Trinity Group                    Cretaceous     Mesozoic
    314  12   Kde     De Queen Ls                      Cretaceous     Mesozoic
    315  13   Kdi     Dierks Ls                        Cretaceous     Mesozoic
    316  52   Ki      Igneous rocks                    Cretaceous     Mesozoic
    401   4   Pzi     Olistoliths of Metagabbro
                       +Soapstone-Serpentine                          Paleozoic
    402 321   &a      Atoka Fm, undivided              Pennsylvanian  Paleozoic
    403 334   &bh     Bloyd Sh and Prairie Grove Mbr
                       of Hale Fm                      Pennsylvanian  Paleozoic
    404 120   &hc     Cane Hill Mbr of Hale Fm         Pennsylvanian  Paleozoic
    405  88   &by     Boggy Fm                         Pennsylvanian  Paleozoic
    406  83   &sv     Savanna Fm                       Pennsylvanian  Paleozoic
    407  84   &ma     McAlester Fm                     Pennsylvanian  Paleozoic
    408  86   &hs     Hartshorne Ss                    Pennsylvanian  Paleozoic
    409 493   &au     Atoka Fm, upper part             Pennsylvanian  Paleozoic
    410 532   &am     Atoka Fm, middle part            Pennsylvanian  Paleozoic
    411 492   &al     Atoka Fm, lower part             Pennsylvanian  Paleozoic
    412  66   &jv     Johns Valley Sh                  Pennsylvanian  Paleozoic
    413   2   &j      Jackfork Ss                      Pennsylvanian  Paleozoic
    501 865   Mpfb    Pitkin Ls, Fayetteville Sh
                       + Batesville Ss                 Mississippian  Paleozoic
    502 490   Mr      Ruddell Sh                       Mississippian  Paleozoic
    503 523   Mm      Moorefield Fm                    Mississippian  Paleozoic
    504 308   Mb      Boone Fm                         Mississippian  Paleozoic
    505 302   Ms      Stanley Sh                       Mississippian  Paleozoic
    506 554   MDa     Arkansas Novaculite              Miss +Devonian Paleozoic
    507 665   MDcp    Chattanooga Sh, Clifty Ls,
                       + Penters Chert                 Miss +Devonian Paleozoic
    601  27   Slsb    Lafferty, St. Clair,
                      and Brassfield Lms               Silurian       Paleozoic
    602  29   Smb     Missouri Mountain Sh
                       + Blaylock Ss                   Silurian       Paleozoic
    701 122   Ocj     Carson Sh, Fernvale Ls,
                       Kimmswick Ls, + Joachim Dm      Ordovician     Paleozoic
    702 131   Ose     St. Peter Ss + Everton Fm        Ordovician     Paleozoic
    703 279   Op      Powell Dolomite                  Ordovician     Paleozoic
    704  91   Ocjc    Cotter and Jefferson City Dm     Ordovician     Paleozoic
    705 408   Opb     Polk Creek Sh and Bigfoot Chert  Ordovician     Paleozoic
    706 100   Ow      Womble Sh                        Ordovician     Paleozoic
    707  95   Ob      Blakely Ss                       Ordovician     Paleozoic
    708 320   Om      Mazarn Sh                        Ordovician     Paleozoic
    709 732   Ocm     Crystal Mountain Ss              Ordovician     Paleozoic
    710 622   Oc      Collier Sh                       Ordovician     Paleozoic
    999 151   H2O     Water
    

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
  2. Who also contributed to the data set?
    Original source of contact, thrust, culture, legend, drainage and type layers is unknown. However I believe that these were created by Rothtek Co. under the direction of Jim Queen of the USGS, Reston. These are the scribe sheets (or copies) used to print the 1993 paper verion of the Geology of Arkansas. These digital scanned scribe were placed on the greenwood ftp server. Greg Green of the USGS Denver, attributed the sheets in Arc/Info. The normal faults and igneous rocks scribe sheets were not found and these were digitized by hand by Green from a liibrary copy. (expect some errors)
  3. To whom should users address questions about the data?
    Gregory N. Green
    U.S. Geological Survey
    geologist
    MS 905, USGS, Denver Federal Center
    Denver, CO
    USA

    (303) 236-5390 (voice)
    ggreen@usgs.gov

Why was the data set created?

This dataset was developed to provide a geologic map GIS database of the State Map of Arkansas for use in spatial analysis by a variety of users.

How was the data set created?

  1. From what previous works were the data drawn?
    Haley, 1993 (source 1 of 1)
    Haley, B.R.; assisted by Glick, E.E., Bush, W.V., Clardy, B.F., Stone, C.G., Woodward, M.B., and Zachry, D.L., 1993, Geologic Map of Arkansas: U.S. Geological Survey, Reston, Virginia, USA.

    Type_of_Source_Media:
    stable-base material: six clear film positives library copy: paper for faults and igneous rocks
    Source_Scale_Denominator: 500000
    Source_Contribution:
    Haley, B.R.; assisted by Glick, E.E., Bush, W.V., Clardy, B.F., Stone, C.G., Woodward, M.B., and Zachry, D.L., compiled the map. Jim Queen created the Scitex plates. Greg Green created the arc/info map.
  2. How were the data generated, processed, and modified?
    Date: 2000 (process 1 of 2)
    Scanned sheets were transformed to register to a Lambert conformal conic projection. (expect small errors) The normal faults and igneous rocks scribe sheets were not found and these were digitized by hand from a liibrary copy.(expect some errors) Formations tagged from paper library copy (expect errors) Extra contacts added by hand to close polygons as needed Shadeset is alc1.shd from alacarte.aml (Wentworth and Fitzgibbon, 1991) Lineset is carto.shd from esri The type cover contains all required geologic symbols Unknown lines and polygons ouccur along the Mississippi river Corrections were made as needed.
    Date: 05-May-2000 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    U.S. Geological Survey
    Attn: Gregory N. Green
    MS 905, USGS, Denver Federal Center
    Denver, CO
    USA

    (303) 236-5390 (voice)
    ggreen@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?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    finished
  5. How consistent are the relationships among the observations, including topology?
    manual check against orginals

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:
This database is not meant to be used or displayed at any scale other than 1:500,000.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    FTP Server
    PO Box 25286, Denver Federal Center
    Denver, CO
    USA

    1-303-236-5390 (voice)
    ggreen@usgs.gov
  2. What's the catalog number I need to order this data set? Digital Version of the Geologic Map of Arkansas
  3. What legal disclaimers am I supposed to read?
    This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey (USGS) editorial standard nor with the North American stratigraphic codes. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the USGS. Although these data have been used by the USGS and have been successfully imported into data base programs, no warranty, expressed or implied, is made by the USGS as to how successfully or accurately the data can be imported into any specific application software running on any specific hardware platform. The fact of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. This data base GIS is not meant to be used or displayed at any scale other than 1:100,000.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 14-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)

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