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Welcome to the
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The Geolex database contains 16,072 entries. 75% of the unit names from the USGS Geologic Names Committee (GNC) card catalog have been entered in the database. Several thousand unit names remain to be checked and entered. 90% of the unit names from the CD-ROM, "Stratigraphic Nomenclature Databases for the United States, its Possessions and Territories," DDS-6, 1996, USGS, have been entered. |
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The National Geologic Map Database and GEOLEX are managed by the USGS's National Cooperative Geologic Mapping Program in cooperation with the Association of American State Geologists.
U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA URL http://ngmdb.usgs.gov/Geolex/geolex_home.html Database project personnel. Last Modified : May 2, 2008 USGS Privacy Statement |
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