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Preliminary Integrated Geologic Map Databases for the United States Central States: Montana, Wyoming, Colorado, New Mexico, Kansas, Oklahoma, Texas, Missouri, Arkansas, and Louisiana, - The State of New Mexico

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?

   Stoeser, Douglas B., Green, Gregory N., Morath, Laurie C., Heran, William D., Wilson, Anna B., Moore, David W., and Bradley S. Van Gosen, 2005, Preliminary Integrated Geologic Map Databases for the United States Central States: Montana, Wyoming, Colorado, New Mexico, Kansas, Oklahoma, Texas, Missouri, Arkansas, and Louisiana, - The State of New Mexico: U.S. Geological Survey Open-File Report 2005-1351, U.S. Geological Survey, Denver, CO.

   Online Links:

   • <http://pubs.usgs.gov/of/2005/1351/>

   This is part of the following larger work.

   Stoeser, Douglas B., Green, Gregory N., Morath, Laurie C., Heran, William D., Wilson, Anna B., Moore, David W., and Bradley S. Van Gosen, 2005, Preliminary Integrated Geologic Map Databases for the United States Central States: Montana, Wyoming, Colorado, New Mexico, Kansas, Oklahoma, Texas, Missouri, Arkansas, and Louisiana.: U.S. Geological Survey Open-File Report 1351, U.S. Geological Survey, Reston, VA.

   Online Links:

   • <http://pubs.usgs.gov/of/2005/1351/>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -109.25

   East_Bounding_Coordinate: -103.00

   North_Bounding_Coordinate: 37.00

   South_Bounding_Coordinate: 31.25

3. What does it look like?

4. Does the data set describe conditions during a particular time period?

   Calendar_Date: 2004

   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?

   nm_geol.pat

   Polygon attribute table for the New Mexico geologic coverage. (Source: ESRI)

   orig_label

   unmodified map unit symbol from source cover. (Source: Doug Stoeser)

   Value	Definition
   ds	disturbed ground
   Qa	alluvium
   Ql	landslide deposits and colluvium
   Qe	eolian deposits
   Qeg	gypsiferous eolian deposits
   Qd	glacial deposit
   Qpl	lacustrine and playa-lake deposits
   Qp	piedmont alluvial deposits
   Qb	basalt and andesite flows and vent deposits
   Qr	silicic volcanic rocks
   Qv	basaltic volcanics
   Qbo	basalt or basaltic andesite
   Qvr	Valles Rhyolite
   Qbt	Bandelier Tuff
   Qoa	older alluvial deposits of upland plains and piedmont areas
   QTb	basaltic and andesitic volcanics interbedded with sedimentary units
   QTt	travertine
   QTp	older piedmont alluvial deposits and shallow basin fill
   QTg	Gila Group
   QTsf	Santa Fe Group
   QTs	Upper Santa Fe Group
   Tus	upper Tertiary sedimentary units
   Tfl	Fence Lake Formation
   Tsf	Lower and Middle Santa Fe Group
   To	Ogallala Formation
   Tlp	Los Pinos Formation of Lower Santa Fe Group
   Tos	sedimentary and vocaniclastic sedimentary rocks
   Thb	Hinsdale Basalt
   Tnb	basalt and andesite flows, Neogene
   Tpb	basalt and andesite flows, Pliocene
   Tmb	basalt and andesite flows, Miocene
   Tnr	silicic to intermediate volcanic rocks
   Tnv	volcanic rocks, Neogene
   Tc	Chuska Sandstone
   Tv	volcanic rocks, middle Tertiary
   Tif	felsic shallow-intrusive rocks
   Tuv	volcanic and some volcaniclastic rocks
   Tlv	volcanic rocks, lower Oligocene and Eocene
   Tuau	basaltic andesites
   Tual	andesites and basaltic andesites
   Turp	rhyolitic pyroclastic rocks
   Tlrp	silicic pyroclastic rocks
   Tla	andesite and basaltic andesite flows and associated volcaniclastic units
   Turf	silicic flows and massess and associated pyroclastic rocks
   Tlrf	silicic flows, domes, and associated pyroclastic rocks
   Ti	intrusive rocks
   Tui	silicic to intermediate intrusive rocks
   Tuim	mafic intrusive rocks
   Tli	quartz monzonites, intermediate intrusives, and other intermediate felsic dikes and plugs
   Tps	sedimentary units, Palogene
   Tsj	San Jose Formation
   Tn	Nacimiento Formation
   Toa	Ojo Alamo Formation
   Tpc	Poison Canyon Formation
   TKr	Raton Formation
   TKpr	Poison Canyon and Raton Fromations
   TKa	Animas Formation
   TKav	andesitic volcanics
   TKi	intrusive rocks, Paleogene and Upper Cretatceous
   K	Cretaceous rocks, undivided
   Ki	intrusive rocks, uppermost Cretaceous
   Ka	andesite flows
   Ku	undivided, Upper Cretaceous
   Kmc	McRae Formation
   Kvt	Vermejo Formation and Trinidad Sandstone
   Kkf	Kirtland and Fruitland Formations
   Kpc	Pictured Cliffs Sandstone
   Kls	Lewis Shale
   Kpn	Pierre Shale and Niobrara Formation
   Knf	Fort Hayes Limestone Member of Niobrara Formation
   Kmv	Mesaverde Group
   Kch	Cliff House Sandstone
   Klv	La Ventana Tongue
   Kmf	Menefee Formation
   Kpl	Point Lookout Sandstone
   Kms	Satan Tongue of Mancos Shale
   Kph	Hosta Tongue of Point Lookout Sandstone
   Kmm	Mulatto Tongue of Mancos Shale
   Kcc	Crevasse Canyon Formation
   Kg	Gallup Sandstone
   Kmg	Gallup Sandstone and underlying D-Cross Tongue of Mancos Shale
   Kmr	Rio Salado Tongue of Mancos Shale
   Kpg	Pescado Tongue of the Mancos Shale and Gallup Sandstone
   Kth	Tres Hermanos Formation
   Kma	Moreno Hill Formation and Atarque Sandstone
   Km	Mancos Shale
   Kmu	Mancos Shale, upper part
   Kml	Mancos Shale, lower part
   Kdr	Dakota Sandstone and Rio Salado Tongue of the Mancos Shale
   Kdm	intertongued Dakota-Mancos sequence
   Kd	Dakota Sandstone
   Kgc	Greenhorn Formation and Carlile Shale
   Kc	Carlile Shale
   Kgg	Graneros Shale and Greenhorn Formation
   Kgh	Greenhorn Formation
   Kgr	Graneros Shale
   Kdg	Dakota Group
   Kbm	Mancos Formation and Beartooth Quartzite
   Kl	Lower Cretaceous, unidivided
   J	middle and upper Jurassic rocks, unidivided
   Jm	Morrison Formation
   Jmsu	Morrison Formation and upper San Rafael Group
   Jz	Zuni Sandstone
   Jze	Zuni and Entrada Sandstones
   Je	Entrada Sandstone
   Jsr	San Rafael Group
   TR	Triassic rocks, undivided
   TRrp	Rock Point Formation of Chinle Group
   TRc	Chinle Group
   TRr	Redonda Formation of Chinle Group
   TRb	Bull Canyon Formation of Chinle Group
   TRt	Trujillo Formation of Chinle Group
   TRg	Garita Creek Formation of Chinle Group
   TRs	Santa Rosa Formation of Chinle Group
   TRcu	upper Chinle Group (Garita Creek, Trujillo, Bull Canyon, and Redonda Formations)
   TRm	Moenkopi Formation
   PZ	Paleozoic rocks, undivided
   P	Permian Rocks, undivided
   Pqr	Quatermaster and Rustler Formations
   Pqm	Quartermaster Formation
   Pr	Rustler Formation
   Psl	Salado Formation
   Pc	Castile Formation
   Pat	Artesia Group
   Pty	Yates and Tansill Formations
   Psr	Seven Rivers Formation
   Pgq	Grayburg and Queen Fromations
   Pcp	Capitan Formation
   Pbc	Bell Canyon Formation
   Pcc	Cherry Canyon Formation
   Psa	San Andres Formation
   Pg	Glorieta Sandstone
   Psg	San Andres Limestone and Glorieta Sandstone
   Pco	Cutoff Shale
   Pvp	Victoria Peak Limestone
   Py	Yesa Formation
   Pa	Abo Formation
   Pau	Abo Formation, upper part
   Pal	Abo Formation, lower part
   Pys	Yeso, Glorieta, and San Andres Formations, undivided
   Pay	Abo and Yeso Formations
   Pct	Cutler Formation
   Ph	Hueco Formation
   Pb	Bursum Formation
   PPA	Permain and Pennsylvanian rocks, undivided
   PPAsc	Sangre de Cristo Formation
   PA	Pennsylvanian rocks, undivided
   PAm	Madera Formation
   PAme	Madera Limestone, exotic blocks
   PAs	Sandia Formation
   PAps	Panther Seep Formation
   PAlc	Lead Camp Formation
   M	Mississippian rocks, undivided
   MD	Mississippian and Devonain rocks, undivided
   MCA	Missippian through Cambrian rocks, undivided
   D	Devonian rocks, undivided
   SO	Silurian and Ordovician rocks, undivided
   SOCA	Silurian through Cambrian rocks, undivided
   OCA	Ordovician and Cambrian rocks, undivided
   OCAp	Ordovician to Cambrian plutonic rocks of Florida Mountains
   Zi	mafic dikes, upper Proterozoic
   Yi	mafic dikes, diabase, metadiabase, metadiorite
   Ys	sedimentary rocks of the Sacramento Mountains
   Yp	plutonic rocks, middle Proterozoic
   YXp	plutonic rocks, middle and lower Proterozoic
   X	lower Proterozoic rocks, undivided
   Xms	metasedimentary rocks
   Xm	metamorphic rocks
   Xp	plutonic rocks, Lower Proterozoic
   Xmo	mafic metamorphic rocks, lower Proterozoic
   Xmu	metamorphic rocks, lower Proterozoic

   sgmc_label

   sgmc_label = orig_label + ;n where n= province number (n=0 if no province) (Source: Doug Stoeser)

   unit_link

   composite map label = ST + sgmc_label This creates a unique identifier for every unit in the CONUS (continental United States) covers. (Source: Doug Stoeser)

   source

   reference to the source used (Source: Doug Stoeser)

   Value	Definition
   NM001

   unit_age

   The geologic age from the source map used. (Source: Doug Stoeser)

   Value	Definition
   Quaternary	geologic age
   Tertiary	geologic age
   Cretaceous	geologic age
   Jurassic	geologic age
   Triassic	geologic age
   Paleozoic; undifferentiated	geologic age
   Permian	geologic age
   Pennsylvanian	geologic age
   Mississippian	geologic age
   Devonian	geologic age
   Silurian	geologic age
   Ordovician	geologic age
   Cambrian	geologic age
   Middle Proterozoic	geologic age
   Lower Proterozoic	geologic age

   rocktype1

   The predominant lithology found in the formation. (Source: unit classification)

   Value	Definition
   eolian
   alluvium
   lake or marine deposit
   till
   travertine
   landslide
   conglomerate
   clay
   mudstone
   evaporite
   shale
   sandstone
   carbonate
   limestone
   clastic
   sedimentary rock
   unconsolidated deposit
   fine-grained mixed clastic
   medium-grained mixed clastic
   coarse-grained mixed clastic
   tuff
   volcanic rock
   lava flow
   rhyolite
   andesite
   basalt
   granitoid
   plutonic rock
   pyroclastic
   quartz monzonite
   felsic volcanic rock
   felsic metavolcanic rock
   mafic metavolcanic rock ?
   metasedimentary rock
   metamorphic rock
   indeterminate
   water

   rocktype2

   The second most predominant lithology in the formation. (Source: unit classification)

   Value	Definition
   colluvium
   alluvium
   eolian
   coal
   conglomerate
   sandstone
   siltstone
   mudstone
   sand
   shale
   stratified glacial sediment
   limestone
   dolomite
   unconsolidated
   sedimentary rock
   arkose
   carbonate
   clastic
   fine-grained mixed clastic
   medium-grained mixed clastic
   mixed clastic/carbonate
   pyroclastic
   rhyolite
   tuff
   andesite
   basalt
   felsic volcanic rock
   intermediate volcanic rock
   alkalic volcanic rock
   mafic volcanic rock
   mixed clastic/volcanic
   plutonic rock

   nm_geol.aat

   Arc attribute table for New Mexico geologic coverage. (Source: ESRI)

   arc-code

   Unique identifier for the line feature (Source: AAT data dictionary, Appendix H)

   Value	Definition
   1	contact, location certain
   4	normal fault, location certain
   5	normal fault, location approximate
   7	shoreline or riverbank
   50	Dike or sills, unspecified
   52	normal fault, concealed
   94	Shear zone, certain
   101	Thrust fault, direction of motion undefined
   121	Dike or sill, mafic
   122	Dike or sill, felsic
   124	state boundary
   125	International Boundary

   arc-para1

   Used for "decorated" lines where additional information is needed. (Source: AAT data dictionary)

   Value	Definition
   0	no additional information
   1	for normal faults, upthrown side is to the right

   arc-para2

   "Scratch" field used mostly in Alaska. (Source: AAT data dictionary)

   Value	Definition
   0	no additional information

   source

   A coded reference citation indicating source material used. (Source: AAT data dictionary)

   Value	Definition
   NM001
   US001

   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)
   • Douglas B. Stoeser
   • Gregory N. Green
   • Laurie C. Morath
   • William D. Heran
   • Anna B. Wilson
   • David W. Moore
   • Bradley S. Van Gosen

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?
   Gregory N. Green
   U.S. Geological Survey
   MS 973, USGS, Denver Federal Center
   Denver, CO 80225
   USA
   

   303-236-5390 (voice)
   ggreen@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?

   Anderson and Jones (1994) (source 1 of 4)

   Anderson, Orin J., and Jones, Glen E., 1994, The Digital Geologic Map of New Mexico: Open File Report OFR 408-A and B, New Mexico Bureau of Mines and Mineral Resources, Socorro, New Mexico.

   Type_of_Source_Media: disc

   Source_Scale_Denominator: 5000000

   Source_Contribution: Original mapping, compilation, and digitizing

   NM001 (source 2 of 4)

   Green, G.N., and Jones, Glen E., 1997, The Digital Geologic Map of New Mexico in ARC/INFO Format: Open File Report OFR 97-0052, U.S. Geological Survey, Denver, Colorado.

   Type_of_Source_Media: digital map

   Source_Scale_Denominator: 500000

   Source_Contribution: Digital geologic map of New Mexico

   US001 (source 3 of 4)

   Johnson, Bruce R., unpublished material, 1:100,000 Scale State Boundaries of the Conterminous United States.

   Type_of_Source_Media: online

   Source_Scale_Denominator: 100,000

   Source_Contribution: Provided linework for state boundaries

   Johnson Lith Class 6.1 (source 4 of 4)

   Johnson, Bruce R., unpublished material, Geologic Map Unit Classification, ver. 6.1.

   Type_of_Source_Media: online; <http://geology.usgs.gov/dm>

   Source_Contribution: Classification scheme used for lithology.

2. How were the data generated, processed, and modified?

   Date: 2003 (process 1 of 6)

   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: 16-Dec-2003 (process 2 of 6)

   G.N. Green obtained the digital geologic map of New Mexico from the website: <http://pubs.usgs.gov/of/1997/ofr-92-0052/> Re-projected the coverage 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: 0.000 false northing: 0.000

   All attributes were deleted except NAME.

   (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 NAME where then calculated into a new field called orig_label.

   Date: 22-Dec-2003 (process 3 of 6)

   The following attributes were exported from Filemaker as a comma delimited file

   map_symbol1 map_symbol2 unit_link reference_id unit_age rocktype1 rocktype2

   The attributes were then loaded into INFO with the following structures:

   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: 08-Sep-2010 (process 4 of 6)

   Once the .csv was loaded, it was joined in Arc/Info with the joinitem command. orig_label as the related item.

   Date: 02-Jan-2004 (process 5 of 6)

   Once the .pat file was correct, the .aat file was addressed. 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: 05-Jan-2004 (process 6 of 6)

   Arc-code was populated using the digital map source to tag the lines using the AAT line type data dictionary. Arc-para1 was populated when additional information was available such as upthrown side of a fault or angle of thrusting on a fault. Arc-para2 is a scratch field that is used mostly in Alaska. Source was populated with code that designates the source used for the linework; typically the paper map.

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?

   The geologic map was digitized from compilations ranging in scale from 1:1,000,000 to 1:100,000 and is an accurate representation of the source maps. It is intended to be used at scales ranging from 1:1,000,000 to 1:500,000. Display at significantly larger scales may produce small errors in locations of contacts or faults relative to features contained in other data sets. Accuracy of New Mexico state boundary and those arcs intersecting it: The accuracy of the state boundary arcs is based on the 1:100000 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
   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?

   USGS OFR 2005-1351

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 1:500,000.

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 8.3)
     Network links:	<http://pubs.usgs.gov/of/2005/1351/>

   • Cost to order the data: none

Who wrote the metadata?

Dates:

Last modified: 29-Oct-2004
Last Reviewed: 20-Oct-2004

Metadata author:

U.S. Geological Survey
Attn: Gregory N. Green
MS 973, USGS, Denver Federal Center
Denver, CO 80225
USA

1-303-236-5390 (voice)
ggreen@usgs.gov

Metadata standard:

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