National Surveys and Analysis Projects
Digital State Geologic Maps
Version 1.00
This web page was developed by the USGS Mineral Resources Program's National Surveys and Analysis Projects (NSA) (http://minerals.usgs.gov/news/newsletter/v1n1/A3.html) to support its State Geologic Map Compilation activity to create a small-scale integrated bedrock-oriented geologic map database of the U.S. based on digital state geologic maps. The purpose of this page is to share information about and expedite access to digital state geologic maps. Information is presented in three categories:
- DIGITAL MAP - information on obtaining the digital version of the state geologic map,
- SOURCE MAP - reference to paper map digitized to create the digital version of the map or if no digital cover is available the current state map,
- COMMENTS - comments in regards to other information about the availability of state level digital maps or subjects of related interest.
The user is advised to check restrictions on use of data downloaded or acquired from these sources.
The USGS does not guarantee the accuracy of outside link content and is providing these links for information purposes only.
Alabama | Alaska | Arizona | Arkansas | California | Colorado | Connecticut | Delaware | District of Columbia | Florida | Georgia | Hawaii | Idaho | Illinois | Indiana | Iowa | Kansas | Kentucky | Louisiana | Maine | Maryland | Massachusetts | Michigan | Minnesota | Mississippi | Missouri | Montana | Nebraska | Nevada | New Hampshire | New Jersey | New Mexico | New York | North Carolina | North Dakota | Ohio | Oklahoma | Oregon | Pennsylvania | Rhode Island | South Carolina | South Dakota | Tennessee | Texas | Utah | Vermont | Virginia | Washington | West Virginia | Wisconsin | Wyoming
Links and references to other key resources
Alabama
Digital Map:
Not available (see comments)
Source Map:
Szabo, M.W., Osborne, W.E., Copeland, C.W., and Neathery, T.L., 1988, Geologic Map of Alabama: Geological Survey of Alabama, SM 220, 1:250,000 scale.
Comments:
A Digital map exists but is not available online (contact the Geological Survey of Alabama: http://www.gsa.state.al.us/). Additional documentation about the development of the Alabama digital geologic map can be found at: http://pubs.usgs.gov/of/of98-487/tew.html.
A raster graphic of the state geologic map is available at: http://www.gsa.state.al.us/gsa/geomap.html (note link at that location to interactive map).
Alaska
Digital Map:
U.S. Geological Survey: http://agdc.usgs.gov/data/usgs/geology/index.html
Source Map:
Beikman, H.M., 1980, Geologic Map of Alaska: U.S. Geological Survey, 2 sheets, 1:2,500,000 scale.
Comments:
The Beikman digital map cited above has serious attribution and accuracy problems (user beware).
No detailed geologic map exists for Alaska. The state is presently being compiled by the NSA as a set of 1:250,000 scale digital covers as an integrated database (contact: Ric Wilson, fwilson). This compilation when complete will be used to compile a new state geologic map.
Two products are available from this work:
- Wilson, F.H., Dover, J.H., Bradley, D.C., Weber, F.R., Bundtzen, T.K., and Haeussler, P.J., 1998, Geologic map of Central (Interior) Alaska: U.S. Geological Survey Open-File Report 98-133, 3 sheets, scale 1:500,000 (CD) - also available online: http://geopubs.wr.usgs.gov/open-file/of98-133-a/
- Frederic H. Wilson, Robert L. Detterman, and Gregory Dubois, 1999, Digital Data for the Geologic Framework of the Alaska Peninsula, Southwest Alaska, and the Alaska Peninsula Terrane: U.S. Geological Survey Open-File Report 99-317: http://geopubs.wr.usgs.gov/open-file/of99-317/
Surficial geology maps for Alaska can be found at: http://www.nps.gov/akso/gis/
A generalized geologic map of Alaska can be found at: http://wwwdggs.dnr.state.ak.us/akgeomap.htm
Arizona
Digital Maps:
Two digital geologic maps are available for Arizona:
- S.J. Richards, 2001 (?), DGM17, Digital Graphic Files for the Geologic Map of Arizona: A Representation of Arizona Geological Survey Map 35, 1 CD-ROM. $15.00 ( http://www.azgs.az.gov/publist_2.htm#digital), scale 1:1,000,000 (not available online).
- D.M. Hirschberg and G.S. Pitts, 2000, Digital Geologic Map of Arizona: A Digital Database Derived from the 1983 printing of the Wilson, Moore, and Cooper 1:500,000-scale map: http://geopubs.wr.usgs.gov/open-file/of00-409/
Source Maps:
S.M. Richard, S.J. Reynolds, J.E. Spencer, and P.A. Pearthree, compilers, 2000, Geologic map of Arizona, Arizona Geological Survey Map M35, 1:1,000,000 scale. Revision of original 1988 map (AGS Map 26). (note the Richard et al map does not have a paper source and was compiled digitally)
Wilson, E. D., Moore, R. T., and Cooper, J. R., 1969, Geologic map of Arizona: U.S. Geological Survey, 1 sheet, 1:500,000 scale. Note - map was reprinted in 1977, 1981, and 1983. Apparently 1983 version has some modifications (see OFR 00-409 metadata file).
Comments:
None
Arkansas
Digital Map:
Stoeser, D.B. Green, G.N., Morath, L.C., Heran, W.D., Wilson, A.B., Moore, D.W., and Van Gosen, B.S., 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 2005-1351, available on-line at http://pubs.usgs.gov/of/2005/1351/#AR.
Digital version of map: http://pubs.usgs.gov/sm/arkansas/download/finished/
or use link from metadata file: http://pubs.usgs.gov/sm/arkansas/.
Source Map:
Haley, B.R., Glick, E.E., Bush, W.V., Clardy, B.F., Stone, C.G., Woodward, M.B., and Zachry, D.L., 1993, Geologic Map of Arkansas: U.S. Geological Survey, 1:500,000 scale.
Comments:
None
California
Digital Map:
Not available online
Source Map:
Jennings, C.W., Strand, R.G., and Rogers, T.H., 1977, Geologic Map of California: Division of Mines and Geology, Geologic Data Map Series Map No. 2, 1:750,000 scale.
Comments:
The digital map is available through the California Geological Survey on CD 2000-07, "GIS Data for the Geologic Map of California": http://www.consrv.ca.gov/cgs/information/publications/pub_index/gis_data.htm. This CD contains a database of geologic units and faults. Files are in both ArcInfo export files (.e00) and MapInfo format. The CD also contains Postscript and ArcInfo plot files, and an Adobe Acrobat image of the map and legend.
Colorado
Digital Map:
Green, G.N., 1992, The digital geologic map of Colorado in ARC/INFO format: U.S. Geological Survey, Open-File Report OFR-92-507, http://pubs.usgs.gov/of/ofr-92-0507/.
Source Map:
Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey special map prepared in cooperation with the Colorado Geological Survey (not part of any formal publication series), 1:500,000 scale.
Comments:
None
Connecticut
Digital Map:
Connecticut MAGIC (Map and Geographic Information Center) Clearinghouse:
http://magic.lib.uconn.edu/cgi-bin/MAGIC_DBsearch2.pl?Geography=37800&Loc=0000.
Source Map:
Rodgers, John, 1985, Bedrock geological map of Connecticut: Connecticut Geological and Natural History Survey, Connecticut Natural Resources Atlas Series, 1:125000 scale.
Comments:
Shapefile format only.
Delaware
Digital Map:
None
Source Map:
Spoljaric, N., and Jordan, R.R., 1966, Generalized Geologic Map of Delaware: Delaware Geological Survey, scale 1:300,000.
Comments:
A raster image map of the geology of Delaware is available at: http://www.udel.edu/dgs/Publications/pubsonline/SP9.pdf. [(PDF file, 1.6 M)]
District of Columbia
Digital Map:
None
Source Map:
Froelich, A.J. and Hack, J.T., 1975, Preliminary geologic map, District of Columbia: U.S. Geological Survey Open-File Report 75-537, 1:24,000 scale.
Comments:
Note that the Maryland map includes the District of Columbia.
Florida
Digital Map:
Source Cover Available from the "Florida Department of Environmental Protection" site: http://www.dep.state.fl.us/geology/gisdatamaps/index.htm.
Source Map:
Brooks, H.K., 1982, Geologic Map of Florida: University of Florida, Center for Environmental and Natural Resources, scale 1:500,000.
Comments:
Note site also contains downloads for the "Florida Geological Survey (FGS) lithologic Database". Use of the database requires the FGSLOGS program also available at the site.
For image maps and a description of the "Geologic Map of the State of Florida" see: http://sofia.usgs.gov/publications/maps/florida_geology/.
Georgia
Digital Map:
Georgia GIS Data Clearinghouse: http://gis1.state.ga.us/index.asp (to locate digital map do a theme search: category "geology", keyword "geology").
Source Map:
Georgia Department of Natural Resources, Geologic and Water Resources Division, Georgia Geological Survey, Lawton, D.E., and Abrams, C.E., Geologic Map of Georgia: Georgia Geological Survey, State Maps 3, 1:500,000 scale.
Comments:
Note the metadata for the above digital map indicates that separate covers exist for: faults, shear and mylonite zones, the Brevard Fault Zone, and diabase dikes (all taken from the 1976 source map) - however these are not available online.
Hawaii
Digital Map:
No digital cover exists for Hawaii.
Source Map:
None, Hawaii has not been compiled as a single state geologic map.
Comments:
The NSA Alaska project is compiling a digital geologic map for Hawaii which should be available some time later in 2004 (check back here).
Idaho
Digital Map:
Johnson, Bruce R., and Raines, Gary L., 1996, Digital representation of the Idaho state geologic map; a contribution to the Interior Columbia River basin ecosystem management project: U.S. Geological Survey Open-File Report 95-0690, http://pubs.usgs.gov/of/1995/of95-690/.
Source Map:
Bond, J.G., Kauffman, J.D., Miller, D.A., and Venkatarishnan, Ramesh, 1978, Geologic Map of Idaho: Idaho Bureau of Mines and Geology, Geologic Map GM-1, 1:500,000 scale.
Comments:
None
Illinois
Digital Map:
Illinois Natural Resources Geospatial Data Clearinghouse: http://www.isgs.uiuc.edu/nsdihome/webdocs/st-geolb.html
Source Map:
Willman, H.B., Frye, J.C., Simon, J.A., Clegg, K.E., Swann, D.H., Atherton, E., Collinson, C., Lineback, J., and Buschbach, T.C., 1967, Geologic Map of Illinois: Illinois State Geological Survey ISGS map, 1:500,000 scale.
Comments:
Digital geological maps for structural features, glacial, and quaternary deposits are also available at the above site.
Indiana
Digital Map:
Indiana covers available from the Indiana Geological Survey (shapefile): http://igs.indiana.edu/arcims/statewide/download.html
Source Map:
Gray, H.H., Ault, C.H., and Keller, S.J., 1987, Bedrock Geologic Map of Indiana: Indiana Geological Survey Miscellaneous Maps MM48, 1:500,000 scale.
Comments:
A digital surficial geology map for Indiana is also available at this site.
For an interactive bedrock geologic map and quarternary geology map of Indiana visit: http://igs.indiana.edu/geology/maps/statebedrock/geology.cfm.
Iowa
Digital Map:
Hoyer, Bernard, 1989, Geologic Map of Iowa: Iowa Department of Natural Resources, Iowa Geological Survey: http://www.igsb.uiowa.edu/nrgis/gishome.htm.
Geologic map of Iowa Circa 1997: http://www.igsb.uiowa.edu/nrgis/gishome.htm
Source Map:
Hershey, H. G., 1969, Geologic Map of Iowa: Iowa Geological Survey Map M-9, scale 1:500,000. (source for the 1989 digital map).
Comments:
This is a bedrock map without surficial units.
Kansas
Digital Map:
Kansas Geospatial Community Commons (a service of the Kansas Data Access & Support Center): http://www.kansasgis.org/
Source Map:
Kansas Geological Survey, 1991, Geology Map of Kansas: Kansas Geological Survey, University of Kansas, Map M-23, 1:500,000 scale.
Comments:
To locate digital map, click on "Kansas GeoDatabase" link, then in left window navigate down to the "LANDSURFACE/GEOLOGY/SOILS" section. Note that when downloading you will be presented with a list of 105 county by county ARC/INFO covers in zip file format (i.e. no single integrated digital map).
An image map of Kansas geology can be found at the Kansas Geological Survey: http://www.kgs.ku.edu/
Kentucky
Digital Map:
Kentucky's Geographic Explorer clearinghouse: http://kygeonet.ky.gov/metadataexplorer/ (see comments)
Source Map:
Martin C. Noger (compiler),1988, Geology of Kentucky: Sesquicentennial Edition of the Kentucky Geological Survey, scale 1:500,000. Based on Geologic Map of Kentucky, Robert C. McDowell, George J. Grabowski, and Samuel L. Moore, 1981, U.S. Geological Survey and Kentucky Geological Survey scale 1:250,000. Tectonic and karst interpretations added by Claude S. Dean, 2002.
Comments:
To find the online digital maps from the above link do a search using available search categories in pull down lists for "Downloadable Data" and "Geologic and Geophysical". This will yield a number of pages of results. Look for download link for "Simplified Geology of Kentucky" (also note link to "Geologic Faults in Kentucky").
Note the separate fault cover does not register (fit) to the polygon geology cover.
Louisiana
Digital Maps:
USGS BRD National Wetlands Research Center, Lafayette, LA (ARC e00 format): http://sdms.cr.usgs.gov/pub/la.html
Louisiana State University "LSU CADGIS Research Laboratory" Atlas clearinghouse web site (shapefile, do a search using "statewide" and "geophysical" theme): http://atlas.lsu.edu/
Source Map:
Snead, John I. and McCulloh, Richard P., 1984, Geologic Map of Louisiana: Louisiana Geological Survey, Baton Rouge, LA. [no series designation]
Comments:
Digital cover lacks faults. A generalized raster geologic map of LA can be found at: http://www.lgs.lsu.edu/pubs/maps.html.
Maine
Digital Map:
Maine GIS Data Catalog clearinghouse: http://Apollo.ogis.state.me.us/catalog/catalog.asp (Look for "bedrock" link on right of page)
Source Map:
Osberg, P.H., Hussey II, A.M., Boone, G.M., Loiselle, M.C., Tucker, R.D., Boudette, E.L., Forbes, W.H., Gates, D., Hall, B.A., Ludman, A., Moench, R.H., Pankiwskyj, V.A., Pollock, S.G., and Roy, D.C., 1985, Bedrock Geologic Map of Maine: Maine Geological Survey Open-File Report, Volume 84-1.
Comments:
A black and white generalized bedrock geologic map of Maine is at: http://www.maine.gov/doc/nrimc/mgs/pubs/index.htm.
Note the bedrock geologic map referred to above is not based on lithology but provenance such that rather than mapping metamorphic rock types the interpreted protolith (primary rock type) is shown.
Maryland
Digital Map:
No digital map available.
Source Map:
Cleaves, E.T., Edwards, J. Jr., and Glaser, J.D., 1968, Geologic Map of Maryland: Maryland Geological Survey, scale 1:250,000.
Comments:
Raster images of the state geology: http://www.mgs.md.gov/coastal/maps/g2.html.
Massachusetts
Digital Map:
No digital map available.
Source Map:
Zen, E., Goldsmith, R., Ratcliffe, N.M., Robinson, P., Stanley, R.S., Hatch, N.L., Jr., Shride, A.F., Weed, E.G.A., and Wones, D.R., 1983, Bedrock Geologic Map of Massachusetts: U.S. Geological Survey, scale 1:250,000.
Comments:
The USGS (NSA) is presently working with a state cooperator to produce the digital version of the state bedrock map. It will be released as an USGS Open-File Report when completed (check back here or at http://pubs.usgs.gov/).
Michigan
Digital Maps:
Michigan Center for Geographic Information: http://www.mcgi.state.mi.us/mgdl/ (click on "theme" link, then in list look for "Bedrock Geology" link).
Also available:
Cannon, W.F., Kress, T.H., Sutphin, D.M., Morey, G.B., Meints, J., Barber-Delach, R.D., 1999, Digital Geologic Map and Mineral Deposits of Minnesota, Wisconsin, and Michigan (Version 3.0): U.S. Geological Survey Open-File Report 97-455, http://pubs.usgs.gov/of/of97-455/.
Source Maps:
Randall, M.L., 1987, Bedrock Geology of Michigan: Michigan Department of Natural Resources, scale 1:500,000.
Randall Milstein L. (compiler), 1987, Bedrock geology of southern Michigan: Geological Survey Division, Michigan Dept. of Natural Resources, Scale: 1:500,000.
Reed, Robert C., and Daniels, Jennifer (compilers), 1987, Bedrock Geology of Northern Michigan: Geological Survey Division, Michigan Department of Natural Resources, Scale: 1:500,000.
Comments:
Quaternary Geology digital map also available at above MCGI link.
Minnesota
Digital Map:
Minnesota Geographic Data Clearinghouse: Morey, G.B. and Meints, J., compilers, 2000, Geologic map of Minnesota, bedrock geology (3rd edition): Minnesota Geological Survey State Map Series S-20, scale 1:1,000,000, http://lucy.lmic.state.mn.us/metadata/stmaps20_3.html.
Also available:
Cannon, W.F., Kress, T.H., Sutphin, D.M., Morey, G.B., Meints, J., Barber-Delach, R.D., 1999, Digital Geologic Map and Mineral Deposits of Minnesota, Wisconsin, and Michigan (Version 3.0): U.S. Geological Survey Open-File Report 97-455, http://pubs.usgs.gov/of/of97-455/.
Source Map:
Morey, G.B. compiler, 1996, Geologic map of Minnesota, bedrock geology: Minnesota Geological Survey State Map Series S-20, scale 1:1,000,000.
Comments:
None
Mississippi
Digital Map:
Mississippi Automated Resource Information System clearinghouse: http://www.maris.state.ms.us/HTM/DataWarehouse/Statewide_alpha.htm
Source Map:
Bicker Jr., A.R., 1969, Geologic Map of Mississippi: U.S. Geological Survey, scale 1:500,000.
Comments:
On the MARIS web page, scroll down and select "surface geology" under the Physiography header. In spite of the implication that this is a surficial geology map, it is the state map.
Missouri
Digital Map:
Missouri Spatial Data Information Service clearinghouse:
ftp://msdis.missouri.edu/pub/state/st_geol.e00.gz (geology)
ftp://msdis.missouri.edu/pub/state/st_fault.e00.gz (faults)
Source Map:
Anderson, K.H. and others, 1979, Geologic Map of Missouri: Missouri Department of Natural Resources - Division of Geology and Land Survey.
Comments:
Link to NSDI metadata: http://msdisweb.missouri.edu/, Link to "anonymous ftp", then find link to "sgeol" and "sfaults" under the "/pub/state/" header (way down the page). Metadata file appears to lack link to data.
Montana
Digital Map:
Gary L. Raines and Bruce R. Johnson, 1996, Digital representation of the Montana state geologic map: a contribution to the Interior Columbia River Basin Ecosystem Management Project: U.S. Geological Survey Open-File Report 95-691, http://pubs.usgs.gov/of/ofr-95-0691/.
Also available at Montant Natural Resource Information System clearinghouse: http://nris.state.mt.us/gis/datalist.html (e00 and shapefile).
Source Map:
Ross, P.R., Andrews, D.A., and Witkind, I.J., 1955, Geologic map of Montana: U.S. Geological Survey, 2 sheets, scale 1:500,000.
Comments:
The USGS source has the state map in two covers (east and west), whereas an integrated cover can be found at the Montana NRIS site above. On the NRIS page look for "1:500,000 scale MBMG Geology" link under "Statewide Data - Land/Water" header.
The Montana Bureau of Mines and Geology is presently in the process of compiling a new state geologic map.
Nebraska
Digital Map:
Nebraska Conservation and Survey Division, Institute of Agriculture and Natural Resources, University of Nebraska: http://csd.unl.edu/general/gis-datasets.asp
Source Map:
Primary souce for the digital map is a series of 1:250K geologic bedrock maps for eastern and southern NE that were digitized. Remainder of state is digitized from Burchett, R. R., 1986, Geologic Bedrock Map of Nebraska: Nebraska Geological Survey, GMC-1, scale 1: 1,000,000.
Comments:
None
Nevada
Digital Map:
Raines, G.L., Connors, K.A., Moyer, L.A., and Miller, R.J., 2003, Spatial digital database for the geologic map of Nevada, U.S. Geological Survey Open-File Report 03-066, http://pubs.usgs.gov/of/2003/of03-66/.
Source Map:
Stewart, J.H., and Carlson, J.E., 1978, Geologic map of Nevada: U.S. Geological Survey, scale 1:500,000.
Comments:
Also available: Turner, Robert M; Bawiec, Walter J; Ambroziak, Russell A, 1991, Geology of Nevada: A Digital Representation of the 1978 Geologic Map of Nevada: U.S. Geological Survey Digital Data Series DDS-2 (CD-ROM).
A nice generalized image map of the geology of Nevada is available at: http://www.nbmg.unr.edu/dox/e30.pdf. [PDF file, 1.1 M]
New Hampshire
Digital Map:
Not available online.
Source Map:
Lyons, J.B., Bothner, W.A., Thompson Jr., J.B., University of New Hampshire, and U.S. Geological Survey, 1997, Bedrock Geologic Map of New Hampshire: U.S. Geological Survey, scale 1:250,000.
Comments:
The New Hampshire map has been digitized by the USGS. NSA is working with the New Hampshire Department of Environmental Services to release the data as soon as possible (see: http://www.des.state.nh.us/Geology/ for information on the State Geology unit of the NHDES).
New Jersey
Digital Map:
Not available online.
Source Map:
Drake Jr., A.A., Volhert, R.A., Monteverde, D.H., Hermann G.C., Houghton, H.F., Parker, R.A., and Dalton, R.A., 1998, Bedrock Geologic Map of Northern New Jersey: U.S. Geological Survey Miscellaneous Investigation Series, Map I-2540-A.
Owens, James P; Sugarman, Peter J; Sohl, Norman F; Parker, Ronald A; Houghton, Hugh F; Volkert, Richard A; Drake, Avery Ala, Jr; Orndorff, Randall C; Bybell, Laurel M; Andrews, George W; Bukry, David; Zapecza, Otto S; Paulachok, Gary N; Mullikin, Lloyd, 1998, Bedrock Geologic Map of central and southern New Jersey: U.S. Geological Survey Miscellaneous Investigation Series, Map I-2540-B.
Comments:
The New Jersey Geological Survey has an unpublished digital map for New Jersey. Check with them in regards to the status of the data. A raster image of the New Jersey geologic map is available at:http://www.state.nj.us/dep/njgs/index.html.
New Mexico
Digital Map:
Green, G.N. and Jones, G.E., 1997, The Digital Geologic Map of New Mexico in ARC/INFO Format: U.S. Geological Survey Open-File Report 97-0052, http://pubs.usgs.gov/of/ofr-97-0052/.
Source Map:
Anderson, O.J. and Jones, G.E., 1994, The Digital Geologic Map of New Mexico: New Mexico Bureau of Mines and Mineral Resources OFR-408-A and -B.
A revised version of the New Mexico paper map has recently been released (see: http://geoinfo.nmt.edu/publications/maps/geologic/state/home.html).
Comments:
None
New York
Digital Map:
http://www.nysm.nysed.gov/gis/
Source Map:
Fisher, D.W., Isachsen, Y.W., and Rickard, L.V., 1970, Geologic Map of New York: New York State Museum and Science Service, New York State Museum Map and Chart Series Number 15, 1:250,000 scale.
Comments:
New York coverage online consists of 5 1:250K covers, which have been tiled to fit together. Surficial geology and fault coverages are also available at the above site.
An excellent image map of the New York Geology is at: http://www.eserc.stonybrook.edu/cen514/fall2002/NYSGeologicMap.html.
North Carolina
Digital Map:
Digital map is available for purchase at NC Corporate Geographic Database, NC Center for Geographic Information and Analysis: http://cgia.cgia.state.nc.us/cgia/.
Source Map:
North Carolina Geological Survey, 1985, Geologic Map of North Carolina: North Carolina Geological Survey, North Carolina Department of Natural Resources and Community, scale 1:500,000.
Comments:
Three digital maps are available at the above site: geology, faults and dikes, all at 1:250,000 scale.
A very nice set of raster image geologic maps of North Carolina is available at The North Carolina Department of Environmental and Natural Resources web site (click on "State Geologic Maps" link): http://gis.enr.state.nc.us/sid/.
A very generalized image map of the geology is at: http://www.geology.enr.state.nc.us/usgs/geomap.htm.
North Dakota
Digital Map:
North Dakota Geological Survey: http://www.state.nd.us/ndgs/Publication_List/fedmiscm_h.htm.
Source Map:
Bluemle, John P., 1983, Geologic and Topographic Bedrock Map of North Dakota, NDGS Miscellaneous Map MM-25, 1:670,000 scale.
Comments:
Link above also leads to 1:500,000 scale surficial geology map.
Simplified geologic map of North Dakota is at: http://www.uwgb.edu/dutchs/StateGeolMaps/NDakGMap.HTM.
Ohio
Digital Map:
None
Source Map:
None
Comments:
The Ohio Department of Natural Resources Division of Geological Survey is in an advanced stage of preparing a new geologic map for Ohio, release date not known.
Generalized geology and glacial raster image maps can be found at: http://www.ohiodnr.com/geosurvey/gen/map/map.htm.
Oklahoma
Digital Map:
Heran, W.D., Green, G.N., and Stoeser, D.B., compilers, A Digital Geologic Map Database for the State of Oklahoma: U.S. Geological Survey Open-File Report 03-247, http://pubs.usgs.gov/of/2003/ofr-03-247/
Source Map:
The above compilation was based on 12 1:250,000 scale geologic maps covering Oklahoma (see introduction included with the above Open-File Report).
Comments:
None
Oregon
Digital Maps:
Walker, G.W., and MacLeod, N.S., 1991, Geologic Map of Oregon: http://geopubs.wr.usgs.gov/docs/geologic/or/oregon.html (look for links in "Geologic Map of Oregon" section of web page.
Miller, R.J., Raines, G.L., and Connors, K.A., 2003, Spatial digital database for the geologic map of Oregon: U.S. Geological Survey Open-File Report 03-067, http://pubs.usgs.gov/of/2003/of03-067/.
Source Map:
Walker, G.W., and MacLeod, N.S., 1991, Geologic map of Oregon, U.S. Geological Survey, scale 1:500,000.
Comments:
None
Pennsylvania
Digital Map:
Pennsylvania Department of Conservation and Natural Resources, Pennsylvania Geological Survey: http://www.dcnr.state.pa.us/topogeo/map1/bedmap.aspx.
Source Map:
Berg, T.M., Edmunds, W.E., Geyer, A.R., Glover, A.D., Hoskins, D.M., MacLachlan, D.B., Root, S.I., Sevon, W.D., Socolow, A.A., Miles, C.E., and Kuchinski, J.G., 1980, Geologic Map of Pennsylvania: Pennsylvania Department of Environmental Resources, Pennsylvania Bureau of Topographic and Geologic Survey Map Series 4, Issue 1.
Comments:
Link above has both e00 and shapefile versions. There is also a separate dikes digital map.
Rhode Island
Digital Map:
Rhode Island Geographic Information System: http://www.edc.uri.edu/rigis-spf/Statewide/state.html#geology
Source Map:
Hermes, O.D., Gromet, L.P., Murray, D.P., Hamidzada, N.A., Skehan, J.W., and Mosher, S., 1994, Bedrock Geologic Map of Rhode Island: University of Rhode Island, Rhode Island Map Series No. 1.
Comments:
A glacial geology digital map is also available at this site.
South Carolina
Digital Map:
None
Source Map:
None
Comments:
NSA is presently working on compiling a geologic map for South Carolina.
In lieu of a state map see: Horton, J.W., Jr., and Dicken, C.L., 2001, Preliminary Digital Geologic Map of the Appalachian Piedmont and Blue Ridge, South Carolina Segment: U.S. Geological Survey Open-File Report 01-298, http://pubs.usgs.gov/of/of01-298/.
South Dakota
Digital Map:
None
Source Map:
None
Comments:
The South Dakota Geological Survey is compiling a new geologic map for South Dakota. Approximate release date is December, 2003 (see: http://www.sdgs.usd.edu/projects/stategeomapproj.html).
Tennessee
Digital Map:
U.S. Geological Survey: http://water.usgs.gov/lookup/getspatial?geo250k
Source Map:
Hardeman, W.D., Miller, R.A., Fullerton, D.S., Sykes, R.R., and Garmanm R.K., 1966, Geologic Map of Tennessee: State of Tennessee, Department of Conservation, Division of Geology, scale 1:250,000.
Comments:
The Tennessee Spatial Data Server clearinghouse has a link to this map (http://www.tngis.org/geology.html) and includes the following notice: "The Tennessee Division of Geology does not endorse this coverage, stating this version is still incomplete and not fit for distribution".
Texas
Digital Map:
None
Source Map:
Hartmann, B.M. and Scranton, D.F., 1992, Geologic Map of Texas: Bureau of Economic Geology, The University of Texas at Austin, 4 sheets.
Comments:
NSA in cooperation with the Texas Bureau of Economic Geology is in the process of digitizing the Texas map. Release details remain to be determined.
Utah
Digital Map:
Not available online.
Hintze, L.F., Willis, G.C., Laes, D.Y.M., Sprinkel, D.A., and Brown, K.D., 2000, Digital geologic map of Utah, Utah Geological Survey (in cooperation with U.S. Geological Survey), Map 179DM, 1 CD-ROM (http://geology.utah.gov/pubs.htm).
Source Map:
Hintze, L.F., 1980, Geologic map of Utah: Utah Geological and Mineral Survey, scale 1:500,000.
Comments:
Both e00 and shapefile format available on the CD-ROM.
A generalized image map of the geology of Utah is available at: http://geology.utah.gov/maps/geomap/statemap/index.htm.
Vermont
Digital Map:
Vermont Center for Geographic Information: http://www.vcgi.org/dataware/.
Source Map:
Doll, C.G., Cady, W.M., Thompson Jr., J.B., and Billings, M.P., 1961, Centennial Geologic Map of Vermont: State of Vermont, scale 1:250,000.
Comments:
The above "bedrock" geology cover is based on the above source map, but is a simplified version which has been reattributed into nine bedrock lithologic classes developed as part of a project to analyze landscape diversity across Vermont. See associated metadata file available at above site for details. The simplification process involved dissolving polygons to simplify the map and original unit attribution was not retained.
The Vermont Geological Survey and the USGS are cooperatively preparing a new geologic map of Vermont (see: http://geology.er.usgs.gov/eespteam/vtp/vermont.html).
For an alternate source of data for Vermont see:
Robinson, G.R., Jr., Kapo, K.E., 2003, Generalized Lithology and Lithogeochemical Character of Near-Surface Bedrock in the New England Region: U.S. Geological Survey Open-File Report 03-225, http://pubs.usgs.gov/of/2003/of03-225/.
A Cenennial geologic map of Vermont is available at: http://www.anr.state.vt.us/dec/geo/centmap.htm.
Virginia
Digital Map:
No online version available.
Source Map:
Virginia Division of Mineral Resources, 1993, Geologic Map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000.
Comments:
The Virginia Division of Mineral Resources is preparing a digital version of the state map (www.mme.state.va.us/DMR/DOCS/Digit/dgm2.html).
Washington
Digital Map:
Raines, Gary L., and Johnson, Bruce R., 1996, Digital representation of the Washington state geologic map; a contribution to the Interior Columbia River basin ecosystem management project. U.S. Geological Survey Open-File Report 95-0684, http://pubs.usgs.gov/of/1995/of95-684/.
Source Map:
Hunting, M.T., Bennet, W.A., Livingston, V.E., and Moen, W.S., 1961, Geologic map of Washington: Washington Division of Mines and Geology, scale 1:500,000.
Comments:
Image maps of Washington geology are available at: http://home.myuw.net/gwyneth/WAGeolMap.gif.
West Virginia
Digital Map:
West Virginia GIS Technical Center: http://wvgis.wvu.edu/data/dataset.php?action=search&ID=43#Fullmd
Source Map:
Cardwell, D.H., Erwin, R.B., and Woodward, H.P., 1968, Geologic Map of West Virginia: West Virginia Geological and Economic Survey, scale 1:250,000.
Comments:
None
Wisconsin
Digital Maps:
Bedrock Type (BRTPxx5C), WiDNR, 1990: Wisconsin Department of Natural Resources (WiDNR), Madison, Wisconsin: http://dnr.wi.gov/landscapes/maps/state/bedrocktype.htm
Also available:
Cannon, W.F., Kress, T.H., Sutphin, D.M., Morey, G.B., Meints, J., Barber-Delach, R.D., 1999, Digital Geologic Map and Mineral Deposits of Minnesota, Wisconsin, and Michigan (Version 3.0): U.S. Geological Survey Open-File Report 97-455, http://pubs.usgs.gov/of/of97-455/.
Source Map:
Mudrey, M.G., Jr., Brown, B.A., and Greenberg, J.K., 1982, Bedrock Geology Map of Wisconsin, scale 1:1,000,000.
Comments:
Raster image map of the Bedrock Geology of Wisconsin (1981; revised 1995):
http://www.uwex.edu/wgnhs/bdrk.htm.
A "surficial deposits" digital map is also available from the Wisconsin Department of Natural Resources (http://dnr.wi.gov/landscapes/maps/state/surficial.htm).
Wyoming
Digital Map:
Green, Gregory N. and Drouillard, Patricia H., 1994,The Digital Geologic Map of Wyoming in ARC/INFO Format: U.S. Geological Survey Open-File Report 94-0425, http://pubs.usgs.gov/of/ofr-94-0425/.
Wyoming Geographic Information Science Center clearinghouse: http://www.sdvc.uwyo.edu/clearinghouse/500k.html.
This page has 3 state geologic map datasets for download, all with e00 and shapefile versions as well as NSDI metadata. These datasets are:
- Bedrock Geology of Wyoming, 1:500,000 scale (same data as the USGS OFR above but as a single file download).
- Faults and Dikes of Wyoming, 1:500,000 scale
- Surface Geology of Wyoming, 1:500,000 scale
Bedrock Source Map:
Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey Special Geologic Map, 3 sheets, scale 1:500000.
Comments:
None
Links and references to other resources
U.S. Geological Survey Web Resources
- Searching for USGS Publications: http://pubs.usgs.gov/
- Ordering USGS Publications: http://ask.usgs.gov/prices/ordering_info.html
- USGS Library: http://library.usgs.gov/ (note catalog search link)
- National Atlas of the United States: http://www.nationalatlas.gov/
- National Geologic Map Database (the best resource on the web for locating U.S. geologic maps): http://ngmdb.usgs.gov/
- USGS Mineral Resources On-Line Spatial Data: http://mrdata.usgs.gov/
- USGS Geo-Data Explorer (GEODE): http://dss1.er.usgs.gov/
Other Resources
Association of American State Geologists (links to all state survey web sites): http://www.stategeologists.org/
National Spatial Data Infrastructure Geospatial One Stop (Links to state clearinghouse websites): http://www.geodata.gov/
A Comprehensive Guide to State and Nationwide GeoData Clearinghouses for the United States: http://www.directionsmag.com/features.php?feature_id=60
The 1:2,500,000-scale digital map of the conterminous U.S. (King and Beikman, 1974): http://pubs.usgs.gov/dds/dds11/kb.html
A state by state rendition of the King and Beikman map is available at: http://www.uwgb.edu/dutchs/StateGeolMaps.HTM
MacLachlan, and others, 1992, Stratigraphic Nomenclature Databases for the United States, Its Possessions and Territories: U.S. Geological Survey Digital Data Series DDS-6 (1 CD). A key resource for information, including lithology, about stratigraphic units. Far from complete, but very useful.
Robinson, G.R., Jr., Kapo, K.E., 2003, Generalized Lithology and Lithogeochemical Character of Near-Surface Bedrock in the New England Region: U.S. Geological Survey Open-File Report 03-225, http://pubs.usgs.gov/of/2003/of03-225/.
Image maps of state level geology at various degrees of simplification maps can be found at: http://geology.about.com/cs/geomapsusstates/.
Inquires in regard to the contents of this page should be made to Douglas Stoeser dstoeser@usgs.gov.
