Mineral Resources On-Line Spatial Data

Geochemical analysis of rock samples collected and analyzed by the USGS. This dataset includes and supersedes rock data formerly released as "Geochemistry of igneous rocks in the US extracted from the PLUTO database". The database contains 414,321 records.

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Continental US	Alaska	Global

Show in your GIS using OGC WMS:

http://mrdata.usgs.gov/cgi-bin/mapserv?map=ngdbrock.map&request=GetCapabilities&service=WMS&version=1.1.1

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Search by state, rock type, or ID number

Get the entire data set

• Zipped DBF files (50 MB in 9 files, expands to 2.2 GB)
• Separate tables, tab-delimited (36 MB in 9 files, expands to 755 MB)

Documentation:

Metadata:

[Outline] - [Questions & Answers] - [Plain text]

About the database fields

• Database structure (tables and field categories)
• Periodic table of elements showing relevant fields in the database
• Frequently Asked Questions

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
URL: http://tin.er.usgs.gov/ngdb/rock/index.shtml
Page Contact Information: Peter Schweitzer
Page Last Modified: Thursday, 22-Oct-2009 21:48:24 EDT