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Preliminary integrated Geologic Map Databases for the United States: Kentucky, Ohio, Tennessee, and West Virginia

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Frequently anticipated questions:


What does this data set describe?

Title:
Preliminary integrated Geologic Map Databases for the United States: Kentucky, Ohio, Tennessee, and West Virginia
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?
    Nicholson, Suzanne W., Dicken, Connie L., Horton, John D., Labay, Keith A., Foose, Michael P., and Mueller, Julia A. L., 2005, Preliminary integrated Geologic Map Databases for the United States: Kentucky, Ohio, Tennessee, and West Virginia: U.S. Geological Survey Open-File Report 2005-1324, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -89.417221
    East_Bounding_Coordinate: -81.665260
    North_Bounding_Coordinate: 39.634579
    South_Bounding_Coordinate: 35.614045
  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?
    ky_geol.pat
    Polygon attribute table for the Kentucky geologic coverage. (Source: ESRI)
    ORIG_LABEL
    unmodified map unit symbol from source cover.

    type: character width: 12 output width: 12 (Source: Geologic map of Kentucky)
    ValueDefinition
    QaAlluvium
    QgGlacial deposits, undifferentiated
    QTclContinental deposits and loess, undifferentiated
    QTcContinental deposits, undifferentiated
    TjcJackson and Claiborne Formations, undivided
    TwWilcox Formation
    TpPorters Creek Clay
    TKcmClayton and McNairy Formations, undivided
    KtTuscaloosa Formation
    PlLamprophyre dikes and sills
    PpPeridotite intrusion
    PmMauzy Formation
    PAsSturgis Formation
    PAcCarbondale Formation
    PAtTradewater Formation
    PAcaCaseyville Formation
    PAmcMonongahela and Conemaugh Formations, undivided
    PAbuBreathitt Formation, upper part
    PAbmBreathitt Formation, middle part
    PAblBreathitt Formation, lower part
    PAlcCorbin Sandstone Member of Lee Formation
    PAlrRockcastle Sandstone Member of Lee Formation
    SbBisher Dolomite
    PAMlLee Formation
    McuRocks of Chesterian age, upper part
    MclRocks of Chesterian age, lower part
    MmsSandstone member of the Mooretown Formation
    MglSte. Genevieve and St. Louis Limestones, undivided
    MwWarsaw Limestone
    MshSalem, Warsaw, and Harrodsburg Limestones, undivided
    lsLimestone bodies in the Fort Payne Formation
    MfkKnifely Sandstone member of the Fort Payne Formation
    MbfRenfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided
    MpkPennington Formation (Paragon Formation), Bangor Limestone, Hartselle Formation, and Kidder Limestone Member of Monteagle Limestone, undivided
    MpnPennington Formation and Newman Limestone
    MnNewman Limestone
    PADpgPennington Formation, Newman Limestone, Fort Payne Chert, Grainger Formation, Sunbury Shale, Berea Sandstone, and Bedford Shale, undivided; Pennington Formation locally includes sandstone tongue of Lee Formation
    MDbbWildie, Nada, Halls Gap, Holtsclaw Siltstone, Cowbell, Nancy, Kenwood Siltstone, New Providence Shale, Sunbury Shale, Berea Sandstone, and Bedford Shale, undivided; Borden Formation locally includes Renfro Member in eastern Kentucky
    DccChert and clay, undifferentiated
    MDnbNew Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided
    MDcChattanooga and Ohio Shales, undivided
    DsjSellersburg and Jeffersonville Limestones, undivided
    SlwLouisville Limestone and Waldron Shale, undivided
    SlbLaurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided
    ScbCrab Orchard Formation and Brassfield Dolomite, undivided
    OclCumberland Formation and Leipers and Catheys (?) Limestones, undivided
    OdDrakes Formation
    OafAshlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided
    OdcDrakes Formation and Grant Lake and Calloway Creek Limestones, undivided
    waterwater
    OdbPreachersville Member of Drakes Formation and Bull Fork Formation, undivided
    ObBull Fork Formation
    ObcBull Fork Formation and Grant Lake and Calloway Creek Limestones, undivided
    OkcGarrard Siltstone and Kope and Clays Ferry Formations, undivided
    OlLexington Limestone
    OhbHigh Bridge Group
    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
    Qa;0Alluvium
    Qg;0Glacial deposits, undifferentiated
    QTcl;0Continental deposits and loess, undifferentiated
    QTc;0Continental deposits, undifferentiated
    Tjc;0Jackson and Claiborne Formations, undivided
    Tw;0Wilcox Formation
    Tp;0Porters Creek Clay
    TKcm;0Clayton and McNairy Formations, undivided
    Kt;0Tuscaloosa Formation
    Pl;0Lamprophyre dikes and sills
    Pp;0Peridotite intrusion
    Pm;0Mauzy Formation
    PAs;0Sturgis Formation
    PAc;0Carbondale Formation
    PAt;0Tradewater Formation
    PAca;0Caseyville Formation
    PAmc;0Monongahela and Conemaugh Formations, undivided
    PAbu;0Breathitt Formation, upper part
    PAbm;0Breathitt Formation, middle part
    PAbl;0Breathitt Formation, lower part
    PAlc;0Corbin Sandstone Member of Lee Formation
    PAlr;0Rockcastle Sandstone Member of Lee Formation
    Sb;0Bisher Dolomite
    PAMl;0Lee Formation
    Mcu;0Rocks of Chesterian age, upper part
    Mcl;0Rocks of Chesterian age, lower part
    Mms;0Sandstone member of the Mooretown Formation
    Mgl;0Ste. Genevieve and St. Louis Limestones, undivided
    Mw;0Warsaw Limestone
    Msh;0Salem, Warsaw, and Harrodsburg Limestones, undivided
    ls;0Limestone bodies in the Fort Payne Formation
    Mfk;0Knifely Sandstone member of the Fort Payne Formation
    Mbf;0Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided
    Mpk;0Pennington Formation (Paragon Formation), Bangor Limestone, Hartselle Formation, and Kidder Limestone Member of Monteagle Limestone, undivided
    Mpn;0Pennington Formation and Newman Limestone
    Mn;0Newman Limestone
    PADpg;0Pennington Formation, Newman Limestone, Fort Payne Chert, Grainger Formation, Sunbury Shale, Berea Sandstone, and Bedford Shale, undivided; Pennington Formation locally includes sandstone tongue of Lee Formation
    MDbb;0Wildie, Nada, Halls Gap, Holtsclaw Siltstone, Cowbell, Nancy, Kenwood Siltstone, New Providence Shale, Sunbury Shale, Berea Sandstone, and Bedford Shale, undivided; Borden Formation locally includes Renfro Member in eastern Kentucky
    Dcc;0Chert and clay, undifferentiated
    MDnb;0New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided
    MDc;0Chattanooga and Ohio Shales, undivided
    Dsj;0Sellersburg and Jeffersonville Limestones, undivided
    Slw;0Louisville Limestone and Waldron Shale, undivided
    Slb;0Laurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided
    Scb;0Crab Orchard Formation and Brassfield Dolomite, undivided
    Ocl;0Cumberland Formation and Leipers and Catheys (?) Limestones, undivided
    Od;0Drakes Formation
    Oaf;0Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided
    Odc;0Drakes Formation and Grant Lake and Calloway Creek Limestones, undivided
    water;0water
    Odb;0Preachersville Member of Drakes Formation and Bull Fork Formation, undivided
    Ob;0Bull Fork Formation
    Obc;0Bull Fork Formation and Grant Lake and Calloway Creek Limestones, undivided
    Okc;0Garrard Siltstone and Kope and Clays Ferry Formations, undivided
    Ol;0Lexington Limestone
    Ohb;0High Bridge Group
    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
    KYQa;0Alluvium
    KYQg;0Glacial deposits, undifferentiated
    KYQTcl;0Continental deposits and loess, undifferentiated
    KYQTc;0Continental deposits, undifferentiated
    KYTjc;0Jackson and Claiborne Formations, undivided
    KYTw;0Wilcox Formation
    KYTp;0Porters Creek Clay
    KYTKcm;0Clayton and McNairy Formations, undivided
    KYKt;0Tuscaloosa Formation
    KYPl;0Lamprophyre dikes and sills
    KYPp;0Peridotite intrusion
    KYPm;0Mauzy Formation
    KYPAs;0Sturgis Formation
    KYPAc;0Carbondale Formation
    KYPAt;0Tradewater Formation
    KYPAca;0Caseyville Formation
    KYPAmc;0Monongahela and Conemaugh Formations, undivided
    KYPAbu;0Breathitt Formation, upper part
    KYPAbm;0Breathitt Formation, middle part
    KYPAbl;0Breathitt Formation, lower part
    KYPAlc;0Corbin Sandstone Member of Lee Formation
    KYPAlr;0Rockcastle Sandstone Member of Lee Formation
    KYSb;0Bisher Dolomite
    KYPAMl;0Lee Formation
    KYMcu;0Rocks of Chesterian age, upper part
    KYMcl;0Rocks of Chesterian age, lower part
    KYMms;0Sandstone member of the Mooretown Formation
    KYMgl;0Ste. Genevieve and St. Louis Limestones, undivided
    KYMw;0Warsaw Limestone
    KYMsh;0Salem, Warsaw, and Harrodsburg Limestones, undivided
    KYls;0Limestone bodies in the Fort Payne Formation
    KYMfk;0Knifely Sandstone member of the Fort Payne Formation
    KYMbf;0Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided
    KYMpk;0Pennington Formation (Paragon Formation), Bangor Limestone, Hartselle Formation, and Kidder Limestone Member of Monteagle Limestone, undivided
    KYMpn;0Pennington Formation and Newman Limestone
    KYMn;0Newman Limestone
    KYPADpg;0Pennington Formation, Newman Limestone, Fort Payne Chert, Grainger Formation, Sunbury Shale, Berea Sandstone, and Bedford Shale, undivided; Pennington Formation locally includes sandstone tongue of Lee Formation
    KYMDbb;0Wildie, Nada, Halls Gap, Holtsclaw Siltstone, Cowbell, Nancy, Kenwood Siltstone, New Providence Shale, Sunbury Shale, Berea Sandstone, and Bedford Shale, undivided; Borden Formation locally includes Renfro Member in eastern Kentucky
    KYDcc;0Chert and clay, undifferentiated
    KYMDnb;0New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided
    KYMDc;0Chattanooga and Ohio Shales, undivided
    KYDsj;0Sellersburg and Jeffersonville Limestones, undivided
    KYSlw;0Louisville Limestone and Waldron Shale, undivided
    KYSlb;0Laurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided
    KYScb;0Crab Orchard Formation and Brassfield Dolomite, undivided
    KYOcl;0Cumberland Formation and Leipers and Catheys (?) Limestones, undivided
    KYOd;0Drakes Formation
    KYOaf;0Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided
    KYOdc;0Drakes Formation and Grant Lake and Calloway Creek Limestones, undivided
    KYwater;0water
    KYOdb;0Preachersville Member of Drakes Formation and Bull Fork Formation, undivided
    KYOb;0Bull Fork Formation
    KYObc;0Bull Fork Formation and Grant Lake and Calloway Creek Limestones, undivided
    KYOkc;0Garrard Siltstone and Kope and Clays Ferry Formations, undivided
    KYOl;0Lexington Limestone
    KYOhb;0High Bridge Group
    source
    An alphanumeric code (e.g. US001) that designates the source material used.

    type: character width: 6 output width: 8 (Source: Doug Stoeser)
    ValueDefinition
    KY001Noger, M.C. comp, 1988, Geologic Map of Kentucky: Lexington, Kentucky, Kentucky Geoogical Survey, scale 1:500,000.
    unit_age
    The geologic age from the source map used.

    type: character width: 60 output width: 60 (Source: Doug Stoeser)
    ValueDefinition
    Devonian to Mississippian 
    Eocene 
    Lower and Middle Devonian 
    Lower Permian 
    Lower to Middle Devonian 
    Lower to Middle Pennsylvania 
    Middle Pennsylvanian 
    Middle to Upper Pennsylvanian 
    Mississippian 
    Ordovician 
    Paleocene 
    Paleocene to Upper Cretaceous 
    Pennsylvanian 
    Pennsylvanian to Mississippian 
    Permian 
    Pleistocene to Holocene 
    Silurian 
    Tertiary 
    Tertiary to Quaternary 
    Upper Cretaceous 
    Upper Mississippian 
    rocktype1
    The predominant lithology found in the formation.

    type: character width: 40 output width: 40 (Source: Johnson Lith Class 6.1a)
    ValueDefinition
    black shale 
    chert 
    clay or mud 
    conglomerate 
    dolostone (dolomite) 
    glacial drift 
    lamprophyre 
    limestone 
    loess 
    peridotite 
    sand 
    sandstone 
    shale 
    siltstone 
    water 
    rocktype2
    The second most predominant lithology in the formation.

    type: character width: 40 output width: 40 (Source: Johnson Lith Class 6.1)
    ValueDefinition
    black shale 
    clay or mud 
    conglomerate 
    dolostone (dolomite) 
    gravel 
    limestone 
    sand 
    sandstone 
    shale 
    silt 
    siltstone 
    ky_geol.aat
    Arc attribute table for Kentucky 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
    4normal fault, location certain
    7shoreline or riverbank
    10thrust fault, lcoation certain (teeth on right from origin)
    35high-angle reverse fault, location certain
    52concealed fault
    54concealed high-angle reverse fault
    90left lateral fault, location certain
    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
    1upthrown side is on the right
    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
    KY001Noger, M.C. comp, 1988, Geologic Map of Kentucky: Lexington, Kentucky, Kentucky Geoogical Survey, scale 1:500,000.
    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?
    kentucky - digital (source 1 of 3)
    Labay, Keith, unpublished, Digital Geologic Map of Kentucky: USGS, Anchorage, Alaska.

    Online Links:

    • none

    Other_Citation_Details:
    Keith Labay of the USGS in Anchorage, Alaska digitized paper map of Kentucky in 2004 and provided C.L. Dicken with the digital files via CD.
    Type_of_Source_Media: vector
    Source_Scale_Denominator: 500,000
    Source_Contribution: provided linework and geology for state map
    state boundaries (source 2 of 3)
    Johnson, Bruce R., unpublished, 1:100,000 Scale State Boundaries of the Conterminous United States.

    Other_Citation_Details:
    Arc/INFO coverage developed by Bruce Johnson. Derived from USGS 100,000-scale DLG boundary layer quadrangles.
    Type_of_Source_Media: online
    Source_Scale_Denominator: 100,000
    Source_Contribution: provided linework of the conterminous state boundaries
    lithclass (source 3 of 3)
    Johnson, Bruce R., unpublished, Geologic Map Unit Classification, ver. 6.1.

    Other_Citation_Details:
    Document has been modified and is included in Appedices of the publication.
    Type_of_Source_Media: online; http:/geology.usgs.gov/dm
    Source_Scale_Denominator: none
    Source_Contribution:
    Source of lithologic codes and specific rock names found in ROCKTYPE1 and ROCKTYPE2.
  2. How were the data generated, processed, and modified?
    Date: 2003 (process 1 of 10)
    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: 2004 (process 2 of 10)
    Keith Labay in Anchorage, AK did the following: The linework was captured by scanning the original paper publication to create a GeoTiff that was then heads up digitized. After digitizing the arcs and polygons were attributed. For the purpose of distribution, the coverage has been converted to an interchange format file using the ARC/INFO export command.
    Date: 2004 (process 3 of 10)
    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. Done by Keith Labay (Anchorage, AK)
    Date: 2004 (process 4 of 10)
    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: 2004 (process 5 of 10)
    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: 2004 (process 6 of 10)
    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: 2004 (process 7 of 10)
    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: 2004 (process 8 of 10)
    Once the .aat and the .pat were populated with the correct attributes, the coverage was exported as an .e00 file (KYgeol_lcc.e00).

    Then it was unprojected into geographic coordinates and exported again (KYgeol_dd.e00).
    Date: 2005 (process 9 of 10)
    Faults were extracted from the coverage and created a separate fault coverage (KYfaults_lcc) and then exported (KYfaults_lcc.e00).
    Date: 2005 (process 10 of 10)
    Finally, the geology lines and geology polygons 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 assigned 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 Kentucky 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: 19-Jan-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/ky.faq.html>

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