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#           Preliminary integrated geologic map databases for the United States: Digital data for the generalized bedrock geologic map, Yukon Flats region, east-central Alaska      

      October 7, 2006    

The growth in the use of Geographic Information Systems (GIS) has highlighted the need for digital geologic maps that have been attributed with information about age and lithology. Such maps can be conveniently used to generate derivative maps for manifold special purposes such as mineral-resource assessment, metallogenic studies, tectonic studies, and environmental research. This report is part of a series of integrated geologic map databases that cover the entire United States. Three national-scale geologic maps that portray most or all of the United States already exist; for the conterminous U.S., King and Beikman (1974a,b) compiled a map at a scale of 1:2,500,000, Beikman (1980) compiled a map for Alaska at 1:2,500,000 scale, and for the entire U.S., Reed and others (2005a,b) compiled a map at a scale of 1:5,000,000. A digital version of the King and Beikman map was published by Schruben and others (1994). Reed and Bush (2004) produced a digital version of the Reed and others (2005a) map for the conterminous U.S. 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. The digital geologic maps presented here are in a standardized format as ARC/INFO export files and as ArcView shape files. Data tables that relate the map units to detailed lithologic and age information accompany these GIS files. The map is delivered as a set 1:250,000-scale quadrangle files. To the best of our ability, these quadrangle files are edge-matched with respect to geology. When the maps are merged, the combined attribute tables can be used directly with the merged maps to make derivative maps.

## Citation Information

## Related Content

                  -              Connect           

#### Julie A Dumoulin, Ph.D.

##### Research Geologist

Alaska Science Center

dumoulin@usgs.gov

907-786-7439

#### Jeffrey Phillips

##### Scientist Emeritus

Geology, Geophysics, and Geochemistry Science Center

jeff@usgs.gov

303-236-1206

#### Richard G Stanley

##### Scientist Emeritus

Geology, Minerals, Energy, and Geophysics Science Center

rstanley@usgs.gov

650-329-4918

## Related Content

#### Julie A Dumoulin, Ph.D.

##### Research Geologist

Alaska Science Center

dumoulin@usgs.gov

907-786-7439

#### Jeffrey Phillips

##### Scientist Emeritus

Geology, Geophysics, and Geochemistry Science Center

jeff@usgs.gov

303-236-1206

#### Richard G Stanley

##### Scientist Emeritus

Geology, Minerals, Energy, and Geophysics Science Center

rstanley@usgs.gov

650-329-4918

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####               Alaska Science Center          

4210 University DriveAnchorage, AK99508United States

(907) 786-7000

(907) 786-7020

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