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Summary
| Description |
English: Figure 1, "Classification of Mineral Resources used in this volume", the original McKelvey Diagram (or McKelvey box) as published in 1973. https://pubs.usgs.gov/circ/1973/0682/report.pdf |
| Date | |
| Source |
"Summary of United States mineral resources" by Donald A. Brobst, Walden P. Pratt, and V. E. McKelvey. Washington : United States Department of the Interior, Geological Survey, 1973, p. 4. https://pubs.usgs.gov/circ/1973/0682/report.pdf |
| Author | V. E. McKelvey |
Licensing
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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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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:37, 2 September 2021 | | 736 × 703 (155 KB) | Mary Mark Ockerbloom | Uploaded a work by V. E. McKelvey from "Summary of United States mineral resources" by Donald A. Brobst, Walden P. Pratt, and V. E. McKelvey. Washington : United States Department of the Interior, Geological Survey, 1973. https://pubs.usgs.gov/circ/1973/0682/report.pdf with UploadWizard |
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