File:McKelvey Box.jpg

McKelvey_Box.jpg (640 × 480 pixels, file size: 246 KB, MIME type: image/jpeg)

Summary

Description
English: A "McKelvey box," designed by former USGS director Vincent McKelvey to illustrate different classes of mineral resources.
Date
Source http://pubs.usgs.gov/circ/1995/circ1118/resass/fig4.html#fig4
Author Vincent McKelvey, director, US Geological Survey

Licensing

Public domain
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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21 April 2013

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current03:03, 22 April 2013Thumbnail for version as of 03:03, 22 April 2013640 × 480 (246 KB)PlazakUser created page with UploadWizard

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