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File:North america rock plutonic.jpg

North_america_rock_plutonic.jpg (644 × 526 pixels, file size: 158 KB, MIME type: image/jpeg)

Four maps show the North American distribution of four principal types of rock: sedimentary, volcanic, plutonic and metamorphic rock.

Source

North America Tapestry of Time and Terrain. (USGS,GSC,COREMI)

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


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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public domain

applies to jurisdiction: United States of America
determination method or standard: work of the federal government of the United States

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Date/TimeThumbnailDimensionsUserComment
current16:16, 16 September 2005Thumbnail for version as of 16:16, 16 September 2005644 × 526 (158 KB)Saperaud~commonswikiFour maps show the North American distribution of four principal types of rock: sedimentary, volcanic, plutonic and metamorphic rock. <gallery> Image:North america rock metamorphic.jpg|

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Quelle: https://en.wikipedia.org/wiki/File:North_america_rock_plutonic.jpg