USGS National Geochemical Survey database

National-scale geochemical analysis of stream sediments and soils in the US, from existing data, reanalysis of existing samples, and new sampling. Goal for sample density is one per 289 square km.

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Continental US	Alaska

Show in Google Earth or download KML:

KMZ, compressed, 2.2M bytes

Show in your GIS using OGC WMS:

http://mrdata.usgs.gov/services/ngs?request=GetCapabilities&service=WMS&version=1.1.1

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Notes on using these data within ArcGIS

Get the entire data set

Shapefile with a subset of 53 attributes: ICP40, As, Se, Hg (74,409 samples, 5.2MB .ZIP package)
dBase file with all 287 attributes (77,212 records, 19.6MB .ZIP package)
CSV file with all 287 attributes (77,212 records, 13MB .ZIP package)

Documentation:

National Geochemical Survey - Full documentation

Complete report on the web including summaries of component datasets used to compile this resource, maps showing county-by- county average concentration of elements, and comprehensive explanations of the analytical methods.

Metadata:

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

About the database fields

Mineral Resources Eastern Central Western Alaska Minerals Information
Spatial Data Crustal Geophysics and Geochemistry Other Mineral Related Links