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Rock type maps for the North America Tapestry of Time and Terrain map.
Four smaller maps show the distribution of four principal types of rock: sedimentary, volcanic, plutonic and metamorphic.
Source
Home: http://pubs.usgs.gov/imap/i2781/
Image: http://pubs.usgs.gov/imap/i2781/i2781_c_low.pdf 144 dpi, encoded to 72 dpi JPEG, compressed slightly to fit within Wikipedia 2MB limit.
Source: English Wikipedia, original upload 15 April 2005 by SEWilco
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public domain in the United States because it only contains materials that originally came from the
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United States Department of the Interior. For more information, see
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:07, 16 September 2005 |
| 644 × 2,146 (641 KB) | Saperaud~commonswiki | thumb|50px|right|N.A. terrain Rock type maps for the North America Tapestry of Time and Terrain map. Four smaller maps show the distribution of four principal types of rock: [[sedimentar |
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