File:Sahara oog.jpg
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Sahara_oog.jpg (538 × 298 pixels, file size: 36 KB, MIME type: image/jpeg)
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Summary
[edit]DescriptionSahara oog.jpg |
Nederlands: Oog in Mauritania
English: This prominent circular feature in the Sahara Desert of Mauritania has attracted attention since the earliest space missions because it forms a conspicuous bull’s-eye in the otherwise rather featureless expanse of the Gres de Chinguetti Plateau in central Mauritania, northwest Africa. Described by some as looking like an outsized ammonite in the desert, the structure [which has a diameter of almost 50 kilometers (30 miles)] has become a landmark for space shuttle crews. Initially interpreted as a meteorite impact structure because of its high degree of circularity, it is now thought to be merely a symmetrical uplift (circular anticline) that has been laid bare by erosion. Paleozoic quartzites form the resistant beds outlining the structure. The reason for the high degree of circularity is not clear.
This true-color scene was acquired by the Moderate-resolution Imaging Spectroradiometer (MODIS), flying aboard NASA’s Terra satellite, on March 11, 2002. |
Date | Taken on 11 March 2002 |
Source | https://earthobservatory.nasa.gov/images/9262/147bull146s-eye148-151-the-richat-structure-mauritania (image link) |
Author | NASA/GSFC/MODIS Land Rapid Response Team and Jacques Descloitres |
Licensing
[edit]Public domainPublic domainfalsefalse |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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Original upload log
[edit]The original description page was here. All following user names refer to nl.wikipedia.
Transferred from nl.wikipedia to Commons by Koektrommel using CommonsHelper.
- 2003-10-30 14:16 Kristof vt 540×300× (24874 bytes) oog in mauretanie van 11 maart 2002 van http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=2124
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:28, 31 March 2015 | 538 × 298 (36 KB) | Ras67 (talk | contribs) | cropped | |
14:08, 17 August 2009 | 540 × 300 (24 KB) | File Upload Bot (Magnus Manske) (talk | contribs) | {{BotMoveToCommons|nl.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{nl|oog in mauretanie van 11 maart 2002 van http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards |
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Orientation | Normal |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop |
File change date and time | 13:03, 31 March 2015 |
Color space | Uncalibrated |