File:McKelvey Box.jpg
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Summary
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| 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 |
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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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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:03, 22 April 2013 | | 640 × 480 (246 KB) | Plazak (talk | contribs) | User created page with UploadWizard |
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