Search the NGDB Rock database

Search here for rock records in the USGS National Geochemical Database. Select a state or rock type if you wish. The search will not return more than 20000 records.

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U.S. Department of the Interior | U.S. Geological Survey
URL: http://tin.er.usgs.gov/ngdb/rock/find-rock.php
Page Contact Information: pschweitzer@usgs.gov
Page Last modified: 10:36 on 04-May-2010