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Mineral Resources On-Line Spatial Data

Mineral Resources > Online Spatial Data > National Geochronological Database

Search the National Geochronological Database

Search here for records in the USGS National Geochronological Database. Select a state or rock type if you wish.

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U.S. Department of the Interior | U.S. Geological Survey
URL: http://tin.er.usgs.gov/geochron/find-geochron.php
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Page Last modified: 10:11 on 20-Apr-2012