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Mineral Resources On-Line Spatial Data

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K/Ar ages from the National Geochronological Database

A subset of the National Geochronological Database as of 1995. Shows the distribution of published K/Ar and Ar/Ar age determinations in the US. Sample location, rock description, analytical data, age, interpretation, and bibliographic reference are given.

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reduced-size image of the interactive map
Continental US
Show in your GIS using OGC WMS:
http://mrdata.usgs.gov/cgi-bin/mapserv?map=karage.map&request=GetCapabilities&service=WMS&version=1.1.1
Download:
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Get the entire data set
karage.zip (1 Mb zipped shapefile expands to 39 Mb)
Documentation:
Metadata:
[Outline] - [Questions & Answers] - [Plain text]
About the database fields
Source of the database:
National geochronological and natural radioelement data bases (CD-ROM)
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URL: http://tin.er.usgs.gov/karage/index.shtml
Page Contact Information: Peter Schweitzer
Page Last Modified: Thursday, 22-Oct-2009 21:48:22 EDT