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#           The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States      

      August 18, 2017    

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View Appendix 1. State Geologic Maps Bibliography

View Appendix 2. State Geologic Map Compilation Attribute Field Definitions for...

View Appendix 3. <em>Age</em> Table Data Dictionary

View Appendix 4. LITH1–LITH5 (<em>Lithology</em> Table) Data Dictionary

View Appendix 5. DESCRIPTION (<em>SGMC_Structure</em> Feature Class) Data Dicti...

View Appendix 6. LITH_FORM (<em>Lithology</em> Table) Data Dictionary

View Appendix 7. Geologic Age Symbols (SGMC_LABEL in <em>Units</em> Table) Data...

Version History

The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States (https://doi. org/10.5066/F7WH2N65) represents a seamless, spatial database of 48 State geologic maps that range from 1:50,000 to 1:1,000,000 scale. A national digital geologic map database is essential in interpreting other datasets that support numerous types of national-scale studies and assessments, such as those that provide geochemistry, remote sensing, or geophysical data. The SGMC is a compilation of the individual U.S. Geological Survey releases of the Preliminary Integrated Geologic Map Databases for the United States. The SGMC geodatabase also contains updated data for seven States and seven entirely new State geologic maps that have been added since the preliminary databases were published. Numerous errors have been corrected and enhancements added to the preliminary datasets using thorough quality assurance/quality control procedures. The SGMC is not a truly integrated geologic map database because geologic units have not been reconciled across State boundaries. However, the geologic data contained in each State geologic map have been standardized to allow spatial analyses of lithology, age, and stratigraphy at a national scale. 

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                  -              Data           
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August 10, 2017

####                 The State Geologic Map Compilation (SGMC) Geodatabase of the Conterminous United States              

Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

#### John D Horton

##### Physical Scientist

Geology, Geophysics, and Geochemistry Science Center

jhorton@usgs.gov

303-236-1921

#### Carma A San Juan

##### Physical Scientist

Geology, Geophysics, and Geochemistry Science Center

csanjuan@usgs.gov

303-236-2450

## Related Content

August 10, 2017

####                 The State Geologic Map Compilation (SGMC) Geodatabase of the Conterminous United States              

Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Earth Mapping Resources Initiative (Earth MRI)

#### John D Horton

##### Physical Scientist

Geology, Geophysics, and Geochemistry Science Center

jhorton@usgs.gov

303-236-1921

#### Carma A San Juan

##### Physical Scientist

Geology, Geophysics, and Geochemistry Science Center

csanjuan@usgs.gov

303-236-2450

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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

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