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Integrated Geologic Map Databases for the United States: Alabama, Florida, Georgia, Mississippi, North Carolina, and South Carolina

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What does this data set describe?

Title:
Integrated Geologic Map Databases for the United States: Alabama, Florida, Georgia, Mississippi, North Carolina, and South Carolina
Abstract:
This report presents the results of the USGS Mineral Resources Program activity to compile a national-scale geologic map database to support national and regional level projects, including mineral resource and geoenvironmental assessments. The only comprehensive sources of regional- and national-scale geologic maps are state geologic maps with scales ranging from 1:100,000 to 1:1,000,000. Digital versions of these state maps form the core of what is presented here. Because no adequate geologic map exists for the state of Alaska, it is being compiled in regional blocks that also form part of this national database. It is expected that this series will completed by approximately the end of 2007. These maps and databases are being released in blocks of states or, in the case of Alaska, as compiled blocks of 1:250,000-scale quadrangles as chapters in this series. For Alaska, formal maps as well as databases are being published here, whereas for the conterminous U.S. only state databases and preview graphics are presented, because published maps for most states already exist. For Alaska these regional compilations will form the base for compiling a new geologic map of the state. As documented in Chapter A, standards for the conterminous U.S. are somewhat different than those for Alaska and Hawaii.
Supplemental_Information:
This database consists of five major Arc/Info GIS datasets for each state; - one: geologic map with formations, - two: faults (where present), - three: dikes (where present), - four: miscellaneous line features (where present), - five: miscellaneous point features (where present).
  1. How might this data set be cited?
    Dicken, Connie L., Nicholson, Suzanne W., Horton, John D., Foose, Michael P., and Mueller, Julia A.L., 2005, Integrated Geologic Map Databases for the United States: Alabama, Florida, Georgia, Mississippi, North Carolina, and South Carolina: U.S. Geological Survey Open-File Report 2005-1323, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -91.654855
    East_Bounding_Coordinate: -88.097733
    North_Bounding_Coordinate: 34.995820
    South_Bounding_Coordinate: 30.037524
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2005Currentness_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 Lambert Conformal Conic.
      Projection parameters:
      Standard_Parallel: 33
      Standard_Parallel: 45
      Longitude_of_Central_Meridian: -100.0
      Latitude_of_Projection_Origin: 0
      False_Easting: 0.00000
      False_Northing: 0.00000
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.01
      Ordinates (y-coordinates) are specified to the nearest 0.01
      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?
    ms_geol.pat
    Polygon attribute table for the Mississippi geologic coverage. (Source: ESRI)
    orig_label
    unmodified map unit symbol from source cover.

    type: character width: 12 output width: 12 (Source: Doug Stoeser)
    ValueDefinition
    CcChester group
    CmChester group
    DChester group
    EcCockfield
    EcmCook Mountain formation
    EjJackson group
    EkKosciusko formation
    EtTallahatta formation and Neshoba sand
    EwWilcox formation
    EwbWilcox formation; Bashi marl member
    EwnWilcox formation; Nanafalia formation of Alabama
    EzwZilpha formation and Winona formation
    KcCoffee sand
    KdDemopolis chalk
    KeEutaw formation
    KetEutaw formation (Tombigbee sand member)
    KmMooreville chalk
    KmaMooreville chalk (Arcola limestone member)
    KpPrairie Bluff chalk and Owl Creek formation
    KrRipley formation
    KrmRipley formation (McNairy sand member)
    KtTuscaloosa formation
    McCatahoula formation
    MphPascagoula and Hattiesburg formation
    OfForest Hill formation and Red Bluff clay
    OvVicksburg group and Chickasawhay limestone
    PacClayton formation
    PanNaheola formation
    PapPorters Creek formation
    PcCitronelle formation
    QaAlluvium
    QcCoastal deposits
    QlLoess and brown loam
    waterwater
    sgmc_label
    orig_label + ;n where n= province number (n=0 if no province number)

    type: character width: 16 output width: 16 (Source: Doug Stoeser)
    ValueDefinition
    Mc;0Chester group
    Mm;0Chester group
    D;0Chester group
    EOc;0Cockfield
    EOcmCook Mountain formation
    EOj;0Jackson group
    EOk;0Kosciusko formation
    EOt;0Tallahatta formation and Neshoba sand
    EOw;0Wilcox formation
    EOwb;0Wilcox formation; Bashi marl member
    EOwn;0Wilcox formation; Nanafalia formation of Alabama
    EOzw;0Zilpha formation and Winona formation
    Kc;0Coffee sand
    Kd;0Demopolis chalk
    Ke;0Eutaw formation
    Ket;0Eutaw formation (Tombigbee sand member)
    Km;0Mooreville chalk
    Kma;0Mooreville chalk (Arcola limestone member)
    Kp;0Prairie Bluff chalk and Owl Creek formation
    Kr;0Ripley formation
    Krm;0Ripley formation (McNairy sand member)
    Kt;0Tuscaloosa formation
    MIc;0Catahoula formation
    MIph;0Pascagoula and Hattiesburg formation
    OGf;0Forest Hill formation and Red Bluff clay
    OGv;0Vicksburg group and Chickasawhay limestone
    PNac;0Clayton formation
    PNan;0Naheola formation
    PNap;0Porters Creek formation
    PSc;0Citronelle formation
    Ha;0Alluvium
    Hc;0Coastal deposits
    PSl;0Loess and brown loam
    water;0water
    unit_link
    composite map label = ST + sgmc_label This creates a unique identifier for every unit in the CONUS (continental United States) covers.

    type: character width: 18 output width: 18 (Source: Doug Stoeser)
    ValueDefinition
    MSMc;0Chester group
    MSMm;0Chester group
    MSD;0Chester group
    MSEOc;0Cockfield
    MSEOcmCook Mountain formation
    MSEOj;0Jackson group
    MSEOk;0Kosciusko formation
    MSEOt;0Tallahatta formation and Neshoba sand
    MSEOw;0Wilcox formation
    MSEOwb;0Wilcox formation; Bashi marl member
    MSEOwn;0Wilcox formation; Nanafalia formation of Alabama
    MSEOzw;0Zilpha formation and Winona formation
    MSKc;0Coffee sand
    MSKd;0Demopolis chalk
    MSKe;0Eutaw formation
    MSKet;0Eutaw formation (Tombigbee sand member)
    MSKm;0Mooreville chalk
    MSKma;0Mooreville chalk (Arcola limestone member)
    MSKp;0Prairie Bluff chalk and Owl Creek formation
    MSKr;0Ripley formation
    MSKrm;0Ripley formation (McNairy sand member)
    MSKt;0Tuscaloosa formation
    MSMIc;0Catahoula formation
    MSMIph;0Pascagoula and Hattiesburg formation
    MSOGf;0Forest Hill formation and Red Bluff clay
    MSOGv;0Vicksburg group and Chickasawhay limestone
    MSPNac;0Clayton formation
    MSPNan;0Naheola formation
    MSPNap;0Porters Creek formation
    MSPSc;0Citronelle formation
    MSHa;0Alluvium
    MSHc;0Coastal deposits
    MSPSl;0Loess and brown loam
    MSwater;0water
    source
    An alphanumeric code (e.g. US001) that designates the source material used.

    type: character width: 6 output width: 8 (Source: Doug Stoeser)
    ValueDefinition
    MS001Moore, William Halsell, 1969, reprinted 1985, Geologic Map of Mississippi, Compiled by Bicker, A. R., Jr., a revision of the geologic map published by the MS Geological Survey in 1945 in cooperation with the USGS, revised from data submitted by Dr. E. E. Russell of MS State University from published reports of the MS Geological Survey and from field revisions, Mercury Maps Inc., Jackson, MS.
    MS201Water polygons that are generated when the standard base map is used (US001).
    MS202Edits by C.L. Dicken.
    unit_age
    The geologic age from the source map used.

    type: character width: 60 output width: 60 (Source: Doug Stoeser)
    ValueDefinition
    Devonian 
    Eocene 
    Holocene 
    Late Cretaceous 
    Miocene 
    Mississippian 
    Oligocene 
    Paleocene 
    Pleistocene 
    Upper Cretaceous 
    rocktype1
    The predominant lithology found in the formation.

    type: character width: 40 output width: 40 (Source: Johnson Lith Class 6.1a)
    ValueDefinition
    alluvium 
    carbonate 
    clay or mud 
    claystone 
    limestone 
    sand 
    sandstone 
    shale 
    water 
    rocktype2
    The second most predominant lithology in the formation.

    type: character width: 40 output width: 40 (Source: Johnson Lith Class 6.1a)
    ValueDefinition
    chert 
    clay or mud 
    gravel 
    limestone 
    mixed clastic/carbonate 
    sand 
    sandstone 
    shale 
    ms_geol.aat
    Arc attribute table for Mississippi geologic coverage. (Source: ESRI)
    arc-code
    Unique identifier for the line feature

    type: integer width: 3 output width: 3 (Source: AAT data dictionary)
    ValueDefinition
    1contact, location certain
    7shoreline or riverbank
    30fault, sense of displacement unknown or undefined, location certain
    51contact, concealed
    124state boundary
    arc-para1
    Used for "decorated" lines where additional information is needed.

    type: integer width: 3 output width: 3 (Source: AAT data dictionary)
    ValueDefinition
    0no additional information
    arc-para2
    "Scratch" field used mostly in Alaska.

    type: integer width: 3 output width: 3 (Source: AAT data dictionary)
    ValueDefinition
    0no additional information
    source
    An alphanumeric code (e.g. US001) that designates the source material used.

    type: character width: 6 output width: 8 (Source: Doug Stoeser)
    ValueDefinition
    MS001Moore, William Halsell, 1969, reprinted 1985, Geologic Map of Mississippi, Compiled by Bicker, A. R., Jr., a revision of the geologic map published by the MS Geological Survey in 1945 in cooperation with the USGS, revised from data submitted by Dr. E. E. Russell of MS State University from published reports of the MS Geological Survey and from field revisions, Mercury Maps Inc., Jackson, MS.
    MS101Edits made by C.L. Dicken. Added arcs to create faults from paper source (MS001).
    US001Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, Chapter A)
    Entity_and_Attribute_Overview:
    Coding for polygon attributes:

    NAME: FEATURE: orig_label unmodified map unit symbols from source cover sgmc_label orig_label modified for standard geologic age symbols and an integer code added for province unit_link sgmc_label and a state code identifier source reference to source of data unit_age geologic age rocktype1 predominant lithology rocktype2 second most predominant lithology

    Coding for arc attributes:

    NAME: FEATURE: arc-code unique integer identifier arc-para1 used where additional information is needed arc-para2 scratch field source reference to source of data

    Coding for point attributes:

    NAME: FEATURE: point_feature name of feature on map source reference to source of data

    Coding for dikes (special arcs) attributes:

    NAME: FEATURE: orig_label unmodified map unit symbols from source cover sgmc_label orig_label modified for standard geologic age symbols and an integer code added for province arc-code unique integer identifier dike_lith general lithology dike_age geologic age source reference to source of data

    Entity_and_Attribute_Detail_Citation: ESRI

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?
    State Geologic Map Compilation (SGMC) activity of the National Surveys and Analysis projects of the US Geological Survey Mineral Resources Program.

  3. To whom should users address questions about the data?
    Suzanne W. Nicholson
    U.S. Geological Survey
    12201 Sunrise Valley Dr. MS954
    Reston, VA
    USA

    703-648-6344 (voice)
    swnich@usgs.gov

Why was the data set created?

A primary goal of this work is to develop geologic map datasets with standardized structure and attribution. The database design and standards are documented in Chapter A of this series. The intent is that contiguous databases can be merged seamlessly and without any additional effort. In addition to a common database structure, the conterminous U.S. state databases (the contiguous 48 states) have been fitted to a set of standard state boundaries so that, when states are merged, they match without slivers or overlap. No attempt has been made to reconcile differences in mapping across state boundaries.

How was the data set created?

  1. From what previous works were the data drawn?
    ms - digital geology (source 1 of 1)
    MS Department of Environmental Quality - Office of Geology, 1991, Surface Geology: unknown, unknown.

    Online Links:

    Type_of_Source_Media: online
    Source_Scale_Denominator: 500,000
    Source_Contribution: provided internal linework and formation code of units.
  2. How were the data generated, processed, and modified?
    Date: 2003 (process 1 of 12)
    The purpose of this standardization is to allow all SGMC covers to be seamlessly joined without any additional effort to form regional or national level digital maps. Note that for Alaska, the state is being compiled as blocks of 1:250k quadrangles that will ultimately be used to compile a new state map. Douglas Stoeser and Ric Wilson are co-coordinators for the overall SGMC effort, with Stoeser coordinating work on the mainland states and Wilson coordinating work for Alaska and Hawaii.
    Date: 08-Jul-2004 (process 2 of 12)
    C.L. Dicken obtained the digital geologic map of Mississippi from the following web site: http://www.maris.state.ms.us

    The coverage was re-projected into the following:

    projection: Lambert Conformal Conic units: meters datum: NAD27 standard parallel 1: 33 0 0.000 standard parallel 2: 45 0 0.000 central meridian: -100 0 0.000 reference latitude: 0 0 0.000 false easting: 0.00000 false northing: 0.00000

    All attributes were deleted except USGS-CODE.

    (Note: Attributes associated with the generation of the coverages were not deleted. PAT - shape, area, perimeter, coverage#, and coverage-id AAT - shape, fnode#, tnode#, lnode#, rnode#, length, coverage#, and coverage-id)

    The values from USGS-CODE where then calculated into a new field called orig_label and altered slightly from all capital letters to capital and lower case letters to match the paper map.

    Date: 08-Jul-2004 (process 3 of 12)
    The internal arcs that were county boundaries were removed from the coverage.
    Date: 16-Nov-2004 (process 4 of 12)
    The relevant state outline (arcs) was removed from the coverage and replaced with the arcs from the 1:100,000 Scale State Boundaries of the Conterminous United States.

    This allows for a seamless fit of each state to a standard state boundary base.

    Water polygons that were generated from the use of this outline are tagged with a source code of MS201.
    Date: 04-Apr-2005 (process 5 of 12)
    The following attributes were exported from Filemaker as a .dbf: orig_label, map_symbol2, unit_link, reference_id, unit_age, rocktype1, and rocktype2.

    orig_label reflects the original map symbol used on the source map

    map_symbol2 reflects map-symbol1 with the addition of a province number

    unit_link is an auto generated field based on map-symbol2 and the state abbreviation (e.g. IN001) that produces a unique identifier for each map unit

    reference_id was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework and other references used to describe the age or lithologies of the unit.

    unit_age was populated with general age assignment

    rocktype1 records dominant lithology (must be >50% of unit), using standardized data dictionary

    rocktype2 records second most dominant lithology, using standardized data dictionary

    The attributes were then converted using the following structure:

    item name: orig_label width: 12 output: 12 type: c

    item name: sgmc_label width: 16 output: 16 type: c

    item name: unit_link width: 18 output: 18 type: c

    item name: source width: 6 output: 8 type: c

    item name: unit_age width: 60 output: 60 type: c

    item name: rocktype1 width: 40 output: 40 type: c

    item name: rocktype2 width: 40 output: 40 type: c
    Date: 14-Mar-2005 (process 6 of 12)
    The USGS-CODE attributes were all capital letters in the digital file. These were modified to match the paper map so we could join the attribute table from filemaker to the digital file.
    Date: 04-Apr-2005 (process 7 of 12)
    Once the .dbf was in the correct format with standardized column widths and data structure, it was converted into a lookup table (.lut) in Arc/Info. Then a joinitem was performed to join the look-up table to the polygon attribute table. orig_label was used as the merge item.
    Date: 17-Nov-2004 (process 8 of 12)
    Next, in preparing the uniform .aat file, the following items were added to the table:

    item name: arc-code width: 3 output: 3 type: i

    item name: arc-para1 width: 3 output: 3 type: i

    item name: arc-para2 width: 3 output: 3 type: i

    item name: source width: 6 output: 8 type: c

    Date: 17-Nov-2004 (process 9 of 12)
    Arc-code was populated using the paper map source to tag the lines using the AAT line type data dictionary (see Chapter A in this series).

    Arc-para1 was populated when additional information was available such as identifying the upthrown side of a fault or direction of thrusting on a fault. (see Chapter A)

    Arc-para2 is a scratch field that is used mostly in Alaska.

    Source was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework.

    Date: 11-Apr-2005 (process 10 of 12)
    Once the .aat and the .pat were populated with the correct attributes, the coverage was exported as an .e00 file (msgeol_lcc.e00).

    Then it was unprojected into geographic coordinates and exported again (msgeol_dd.e00).
    Date: 11-Apr-2005 (process 11 of 12)
    The faults were extracted to generate a separate fault file. PUT was the command used to copy the line features from the geology line coverage into a new fault line coverage.

    The data were exported as msfaults_lcc.e00 and then unprojected into geographic coordinates and exported again (msfaults_dd.e00).
    Date: 11-Apr-2005 (process 12 of 12)
    Finally, the geology lines, geology polygons and fault line coverages were converted into shapefiles; in both geographic coordinates and in Lambert Conformal Conic projection.
  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 values of the attributes ROCKTYPE1 and ROCKTYPE2 were a ssigned based on the information in the legends of the source maps (most of which are paper). The definitions of these values are described in the draft document Geologic Map Classification version 6.1 (Johnson and others); available at the following website: http://geology.usgs.gov/dm
  2. How accurate are the geographic locations?
    Accuracy of Mississippi state boundary and those arcs intersecting it: The accuracy of the state boundary arcs is based on the 1:100,000 scale original data used to produce this boundary. (Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, Chapter A))

    Those internal arcs intersecting the state boundary were extended or shortened as needed to complete polygons, possibly creating a small amount of error.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Bodies of water are classified as water, and the geologic units underlying them are not included in this coverage.
  5. How consistent are the relationships among the observations, including topology?
    All internal polygons were checked for closure with vendor software and on hard copy plots. Overshoots and undershoots have been deleted or corrected as appropriate.

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.

Any hardcopies utilizing these data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by the U.S. Geological Survey.

  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey Information Services Reston-ESIC
    U.S. Geological Survey
    507 National Center
    Reston, Virginia
    USA

    1-888-ASK-USGS or 1-703-648-5953 (voice)
    http://www.usgs.gov/contact/
  2. What's the catalog number I need to order this data set?
  3. What legal disclaimers am I supposed to read?
    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 1:500,000.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 11-Apr-2005
Metadata author:
U.S. Geological Survey
Attn: Connie L. Dicken
12201 Sunrise Valley Dr. MS954
Reston, VA
USA

703-648-6482 (voice)
cdicken@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://mrdata.usgs.gov/geology/state/metadata/ms.faq.html>

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