File:North_america_basement_rocks.png
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North_america_basement_rocks.png (484 × 429 pixels, file size: 31 KB, MIME type: image/png)
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DescriptionNorth america basement rocks.png |
North American cratons and basement rocks. As radiometric ages were determined for the shield-like rocks on the continents which were either exposed at the surface, underlay the flat rocks, or were within the interior of the mountain belts, patterns of age intervals were determined. These old rocks have been called the "basement". This has been interpreted to mean that the continents had somehow grown by development of rock assemblages with these characteristic age parameters. The expanding continental nuclei are part of the "craton" which consist of both exposed and buried basement rocks. |
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Source | http://rst.gsfc.nasa.gov/Sect2/14strprv.jpg or http://instruct.uwo.ca/earth-sci/300b-001/14strprv.gif English Wikipedia, original upload 22 April 2005 by Berkut Originally uploaded by User:SEWilco as Image:North america basement rocks.jpg. Replaced when this better version found. | ||||
Author | USGS | ||||
Permission (Reusing this file) |
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derivative works
Derivative works of this file: North america and scandinavia basement rocks.png
5 March 2015
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:48, 11 October 2019 | 484 × 429 (31 KB) | Ciaurlec | Reverted to version as of 21:20, 29 September 2019 (UTC) | |
13:52, 30 September 2019 | 484 × 429 (37 KB) | Ciaurlec | Reverted to version as of 19:38, 29 September 2019 (UTC) | ||
21:20, 29 September 2019 | 484 × 429 (31 KB) | Ciaurlec | Major colour change to make conform to Geologic time scale where possible. Used also some other graphic changes as in File:North america and scandinavia basement rocks.png 2nd upload | ||
19:38, 29 September 2019 | 484 × 429 (37 KB) | Ciaurlec | Major colour change to make conform to Geologic time scale where possible. Used also some other graphic changes as in File:North america and scandinavia basement rocks.png | ||
15:47, 16 September 2005 | 484 × 429 (13 KB) | Saperaud~commonswiki | North American cratons and basement rocks. As radiometric ages were determined for the shield-like rocks on the continents which were either exposed at the surface, underlay the flat rocks, or were within the interior of the mountain belts, patte |
File usage
- Churchill Craton
- Geography of North America
- Geology of Ontario
- Hearne Craton
- Innuitian orogeny
- Lake Nipigon
- Laurentia
- List of shields and cratons
- List of tectonic plates
- North America
- Rae Craton
- Slave Craton
- Superior Craton
- Taltson Magmatic Zone
- Trans-Hudson orogeny
- Wyoming Craton
- Talk:Abiogenic petroleum origin/Archive 1
- Talk:Geology of the United States/Archive 1
- User:Charlespsml/sandbox
- User:Ryleymac/sandbox
- User:SEWilco/Images
- Wikipedia:Graphics Lab/Image workshop/Archive/Feb 2009
- Wikipedia:Graphics Lab/Map workshop/Archive/May 2009
- Wikipedia:Reference desk/Archives/Science/2016 July 26
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Horizontal resolution | 47.24 dpc |
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Vertical resolution | 47.24 dpc |