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This Web site contains information on activities of the National Geologic Map Database Project (NGMDB). The NGMDB is a collaborative effort primarily involving the USGS and the Association of American State Geologists. This Web site contains informal, generally time-sensitive material intended for project members, cooperators, and interested parties.

Geologic map of a portion of the US
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               (Search for maps and geologic names)
    orange bulletPublications and General Info || En Espaņol
       orange bullet Standards and Guidelines
        orange bulletDigital mapping techniques logo
       orange bullet Developing an Online Map Database
     orange bullet Information for NGMDB partners
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This page is
Maintained by Dave Soller (