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#           Preliminary integrated geologic map databases for the United States: Alabama, Florida, Georgia, Mississippi, North Carolina, and South Carolina      

      October 2, 2005    

The growth in the use of Geographic Information Systems (GIS) has highlighted the need for regional and national digital geologic maps attributed with age and lithology information. Such maps can be conveniently used to generate derivative maps for purposes including mineral-resource assessment, metallogenic studies, tectonic studies, and environmental research. This Open-File Report is a preliminary version of part of a series of integrated state geologic map databases that cover the entire United States.

The only national-scale digital geologic maps that portray most or all of the United States for the conterminous U.S. are the digital version of the King and Beikman (1974a, b) map at a scale of 1:2,500,000, as digitized by Schruben and others (1994) and the digital version of the Geologic Map of North America (Reed and others, 2005a, b) compiled at a scale of 1:5,000,000 which is currently being prepared by the U.S. Geological Survey. The present series of maps is intended to provide the next step in increased detail. State geologic maps that range in scale from 1:100,000 to 1:1,000,000 are available for most of the country, and digital versions of these state maps are the basis of this product. In a few cases, new digital compilations were prepared (e.g. OH, SC, SD) or existing paper maps were digitized (e.g. KY, TX). For Alaska and Hawaii, new regional maps are being compiled and ultimately new state maps will be produced.

The digital geologic maps are presented in standardized formats as ARC/INFO (.e00) export files and as ArcView shape (.shp) files. Accompanying these spatial databases are a set of five supplemental data tables that relate the map units to detailed lithologic and age information. The maps for the CONUS have been fitted to a common set of state boundaries based on the 1:100,000 topographic map series of the United States Geological Survey (USGS). When the individual state maps are merged, the combined attribute tables can be used directly with the merged maps to make derivative maps. No attempt has been made to reconcile differences in mapped geology across state lines.

## Citation Information

## Related Content

                  -              Connect           

#### Connie L. Dicken

##### Geologist

Geology, Energy & Minerals Science Center

cdicken@usgs.gov

703-648-6482

#### Suzanne W Nicholson, Ph.D.

##### Associate Program Coordinator - Science

Mineral Resources Program

swnich@usgs.gov

703-648-6344

#### John D Horton

##### Physical Scientist

Geology, Geophysics, and Geochemistry Science Center

jhorton@usgs.gov

303-236-1921

## Related Content

#### Connie L. Dicken

##### Geologist

Geology, Energy & Minerals Science Center

cdicken@usgs.gov

703-648-6482

#### Suzanne W Nicholson, Ph.D.

##### Associate Program Coordinator - Science

Mineral Resources Program

swnich@usgs.gov

703-648-6344

#### John D Horton

##### Physical Scientist

Geology, Geophysics, and Geochemistry Science Center

jhorton@usgs.gov

303-236-1921

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#### Geology, Geophysics, and Geochemistry Science Center

West 6th Avenue and Kipling StreetDenver Federal Center Building 20Denver, CO80225United States

303-236-1800

303-236-3200

####               Geology, Energy & Minerals Science Center          

12201 Sunrise Valley Drive Mail Stop 954Reston, VA20192United States

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