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

Frequently anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  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?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should 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:

   • <http://pubs.usgs.gov/of/2005/1324>

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: 2005

   Currentness_Reference: publication date

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: map

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a Vector data set.

   2. What coordinate system is used to represent geographic features?

      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)

   Value	Definition
   Qa	Alluvium
   Qg	Glacial deposits, undifferentiated
   QTcl	Continental deposits and loess, undifferentiated
   QTc	Continental deposits, undifferentiated
   Tjc	Jackson and Claiborne Formations, undivided
   Tw	Wilcox Formation
   Tp	Porters Creek Clay
   TKcm	Clayton and McNairy Formations, undivided
   Kt	Tuscaloosa Formation
   Pl	Lamprophyre dikes and sills
   Pp	Peridotite intrusion
   Pm	Mauzy Formation
   PAs	Sturgis Formation
   PAc	Carbondale Formation
   PAt	Tradewater Formation
   PAca	Caseyville Formation
   PAmc	Monongahela and Conemaugh Formations, undivided
   PAbu	Breathitt Formation, upper part
   PAbm	Breathitt Formation, middle part
   PAbl	Breathitt Formation, lower part
   PAlc	Corbin Sandstone Member of Lee Formation
   PAlr	Rockcastle Sandstone Member of Lee Formation
   Sb	Bisher Dolomite
   PAMl	Lee Formation
   Mcu	Rocks of Chesterian age, upper part
   Mcl	Rocks of Chesterian age, lower part
   Mms	Sandstone member of the Mooretown Formation
   Mgl	Ste. Genevieve and St. Louis Limestones, undivided
   Mw	Warsaw Limestone
   Msh	Salem, Warsaw, and Harrodsburg Limestones, undivided
   ls	Limestone bodies in the Fort Payne Formation
   Mfk	Knifely Sandstone member of the Fort Payne Formation
   Mbf	Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided
   Mpk	Pennington Formation (Paragon Formation), Bangor Limestone, Hartselle Formation, and Kidder Limestone Member of Monteagle Limestone, undivided
   Mpn	Pennington Formation and Newman Limestone
   Mn	Newman Limestone
   PADpg	Pennington 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	Wildie, 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	Chert and clay, undifferentiated
   MDnb	New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided
   MDc	Chattanooga and Ohio Shales, undivided
   Dsj	Sellersburg and Jeffersonville Limestones, undivided
   Slw	Louisville Limestone and Waldron Shale, undivided
   Slb	Laurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided
   Scb	Crab Orchard Formation and Brassfield Dolomite, undivided
   Ocl	Cumberland Formation and Leipers and Catheys (?) Limestones, undivided
   Od	Drakes Formation
   Oaf	Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided
   Odc	Drakes Formation and Grant Lake and Calloway Creek Limestones, undivided
   water	water
   Odb	Preachersville Member of Drakes Formation and Bull Fork Formation, undivided
   Ob	Bull Fork Formation
   Obc	Bull Fork Formation and Grant Lake and Calloway Creek Limestones, undivided
   Okc	Garrard Siltstone and Kope and Clays Ferry Formations, undivided
   Ol	Lexington Limestone
   Ohb	High 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)

   Value	Definition
   Qa;0	Alluvium
   Qg;0	Glacial deposits, undifferentiated
   QTcl;0	Continental deposits and loess, undifferentiated
   QTc;0	Continental deposits, undifferentiated
   Tjc;0	Jackson and Claiborne Formations, undivided
   Tw;0	Wilcox Formation
   Tp;0	Porters Creek Clay
   TKcm;0	Clayton and McNairy Formations, undivided
   Kt;0	Tuscaloosa Formation
   Pl;0	Lamprophyre dikes and sills
   Pp;0	Peridotite intrusion
   Pm;0	Mauzy Formation
   PAs;0	Sturgis Formation
   PAc;0	Carbondale Formation
   PAt;0	Tradewater Formation
   PAca;0	Caseyville Formation
   PAmc;0	Monongahela and Conemaugh Formations, undivided
   PAbu;0	Breathitt Formation, upper part
   PAbm;0	Breathitt Formation, middle part
   PAbl;0	Breathitt Formation, lower part
   PAlc;0	Corbin Sandstone Member of Lee Formation
   PAlr;0	Rockcastle Sandstone Member of Lee Formation
   Sb;0	Bisher Dolomite
   PAMl;0	Lee Formation
   Mcu;0	Rocks of Chesterian age, upper part
   Mcl;0	Rocks of Chesterian age, lower part
   Mms;0	Sandstone member of the Mooretown Formation
   Mgl;0	Ste. Genevieve and St. Louis Limestones, undivided
   Mw;0	Warsaw Limestone
   Msh;0	Salem, Warsaw, and Harrodsburg Limestones, undivided
   ls;0	Limestone bodies in the Fort Payne Formation
   Mfk;0	Knifely Sandstone member of the Fort Payne Formation
   Mbf;0	Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided
   Mpk;0	Pennington Formation (Paragon Formation), Bangor Limestone, Hartselle Formation, and Kidder Limestone Member of Monteagle Limestone, undivided
   Mpn;0	Pennington Formation and Newman Limestone
   Mn;0	Newman Limestone
   PADpg;0	Pennington 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;0	Wildie, 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;0	Chert and clay, undifferentiated
   MDnb;0	New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided
   MDc;0	Chattanooga and Ohio Shales, undivided
   Dsj;0	Sellersburg and Jeffersonville Limestones, undivided
   Slw;0	Louisville Limestone and Waldron Shale, undivided
   Slb;0	Laurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided
   Scb;0	Crab Orchard Formation and Brassfield Dolomite, undivided
   Ocl;0	Cumberland Formation and Leipers and Catheys (?) Limestones, undivided
   Od;0	Drakes Formation
   Oaf;0	Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided
   Odc;0	Drakes Formation and Grant Lake and Calloway Creek Limestones, undivided
   water;0	water
   Odb;0	Preachersville Member of Drakes Formation and Bull Fork Formation, undivided
   Ob;0	Bull Fork Formation
   Obc;0	Bull Fork Formation and Grant Lake and Calloway Creek Limestones, undivided
   Okc;0	Garrard Siltstone and Kope and Clays Ferry Formations, undivided
   Ol;0	Lexington Limestone
   Ohb;0	High 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)

   Value	Definition
   KYQa;0	Alluvium
   KYQg;0	Glacial deposits, undifferentiated
   KYQTcl;0	Continental deposits and loess, undifferentiated
   KYQTc;0	Continental deposits, undifferentiated
   KYTjc;0	Jackson and Claiborne Formations, undivided
   KYTw;0	Wilcox Formation
   KYTp;0	Porters Creek Clay
   KYTKcm;0	Clayton and McNairy Formations, undivided
   KYKt;0	Tuscaloosa Formation
   KYPl;0	Lamprophyre dikes and sills
   KYPp;0	Peridotite intrusion
   KYPm;0	Mauzy Formation
   KYPAs;0	Sturgis Formation
   KYPAc;0	Carbondale Formation
   KYPAt;0	Tradewater Formation
   KYPAca;0	Caseyville Formation
   KYPAmc;0	Monongahela and Conemaugh Formations, undivided
   KYPAbu;0	Breathitt Formation, upper part
   KYPAbm;0	Breathitt Formation, middle part
   KYPAbl;0	Breathitt Formation, lower part
   KYPAlc;0	Corbin Sandstone Member of Lee Formation
   KYPAlr;0	Rockcastle Sandstone Member of Lee Formation
   KYSb;0	Bisher Dolomite
   KYPAMl;0	Lee Formation
   KYMcu;0	Rocks of Chesterian age, upper part
   KYMcl;0	Rocks of Chesterian age, lower part
   KYMms;0	Sandstone member of the Mooretown Formation
   KYMgl;0	Ste. Genevieve and St. Louis Limestones, undivided
   KYMw;0	Warsaw Limestone
   KYMsh;0	Salem, Warsaw, and Harrodsburg Limestones, undivided
   KYls;0	Limestone bodies in the Fort Payne Formation
   KYMfk;0	Knifely Sandstone member of the Fort Payne Formation
   KYMbf;0	Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided
   KYMpk;0	Pennington Formation (Paragon Formation), Bangor Limestone, Hartselle Formation, and Kidder Limestone Member of Monteagle Limestone, undivided
   KYMpn;0	Pennington Formation and Newman Limestone
   KYMn;0	Newman Limestone
   KYPADpg;0	Pennington 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;0	Wildie, 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;0	Chert and clay, undifferentiated
   KYMDnb;0	New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided
   KYMDc;0	Chattanooga and Ohio Shales, undivided
   KYDsj;0	Sellersburg and Jeffersonville Limestones, undivided
   KYSlw;0	Louisville Limestone and Waldron Shale, undivided
   KYSlb;0	Laurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided
   KYScb;0	Crab Orchard Formation and Brassfield Dolomite, undivided
   KYOcl;0	Cumberland Formation and Leipers and Catheys (?) Limestones, undivided
   KYOd;0	Drakes Formation
   KYOaf;0	Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided
   KYOdc;0	Drakes Formation and Grant Lake and Calloway Creek Limestones, undivided
   KYwater;0	water
   KYOdb;0	Preachersville Member of Drakes Formation and Bull Fork Formation, undivided
   KYOb;0	Bull Fork Formation
   KYObc;0	Bull Fork Formation and Grant Lake and Calloway Creek Limestones, undivided
   KYOkc;0	Garrard Siltstone and Kope and Clays Ferry Formations, undivided
   KYOl;0	Lexington Limestone
   KYOhb;0	High 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)

   Value	Definition
   KY001	Noger, 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)

   Value	Definition
   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)

   Value	Definition
   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)

   Value	Definition
   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)

   Value	Definition
   1	contact, location certain
   4	normal fault, location certain
   7	shoreline or riverbank
   10	thrust fault, lcoation certain (teeth on right from origin)
   35	high-angle reverse fault, location certain
   52	concealed fault
   54	concealed high-angle reverse fault
   90	left lateral fault, location certain
   124	state boundary

   arc-para1

   Used for "decorated" lines where additional information is needed.

   type: integer width: 3 output width: 3 (Source: AAT data dictionary)

   Value	Definition
   0	no additional information
   1	upthrown side is on the right

   arc-para2

   "Scratch" field used mostly in Alaska.

   type: integer width: 3 output width: 3 (Source: AAT data dictionary)

   Value	Definition
   0	no 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)

   Value	Definition
   KY001	Noger, M.C. comp, 1988, Geologic Map of Kentucky: Lexington, Kentucky, Kentucky Geoogical Survey, scale 1:500,000.
   US001	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)

   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)
   • Nicholson, Suzanne W.
   • Dicken, Connie L.
   • Horton, John D.
   • Labay, Keith A.
   • Foose, Michael P.
   • Mueller, Julia A. L.

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 20192
   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 20192
   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?
   • Availability in digital form:

     Data format:	Geologic units and structural features in format ARC/INFO export (version 9.0)
     Network links:	<http://pubs.usgs.gov/of/2005/1324>

   • Cost to order the data: none

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 20192
USA

703-648-6482 (voice)
cdicken@usgs.gov

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)