Tenoumer is considered to be an impact crater in Mauritania.[1]
| Tenoumer crater | |
|---|---|
 | |
| Impact crater/structure | |
| Confidence | Confirmed |
| Diameter | 1.9 km (1.2 mi) |
| Depth |
|
| Age | 21,400 ± 9,700 |
| Location | |
| Coordinates | 22°55′5″N 10°24′27″W / 22.91806°N 10.40750°W |
| Country | Mauritania |
  Tenoumer crater Asteroid impact location in Africa | |
Details
editThe crater is located in the western Sahara Desert. It is 1.9 km (1.2 mi) in diameter and its age was estimated to be 21,400 ± 9,700 years old but as of 2016, is thought to be ~1.57 Ma.[2]
The crater is exposed at the surface and is nearly circular. Edges of the crater rise up to 110 m (360 ft) high above the base of the crater, but the bottom of the crater is covered with an approximately 200 to 300 m (660 to 980 ft) thick layer of sediments.[3]
Tenoumer crater has formed in gneiss and granite of Precambrian peneplain with a thin layer of Pliocene sediments (no older). The crater is believed to be caused by an impact event due to basement rocks found outside the crater. A volcanic origin was once theorized because of the discovery of basalt and rhyodacite outside of the crater basin,[4] but current evidence clearly indicates an impact origin.[5]
References
edit- ^ "Tenoumer". Earth Impact Database. Planetary and Space Science Centre University of New Brunswick Fredericton. Retrieved 2009-08-16.
- ^ Schultze, Dina Simona; Jourdan, Fred; Hecht, Lutz; Reimold, Wolf Uwe; Ralf-Thomas, Schmitt (2016). "Tenoumer impact crater, Mauritania: Impact melt genesis from a lithologically diverse target" (PDF). Meteoritics and Planetary Science. 51 (2). The Meteoritical Society: 323–350. Bibcode:2016M&PS...51..323S. doi:10.1111/maps.12593.
- ^ "Tenoumer Crater, Mauritania". www.esa.int. Retrieved 2022-11-20.
- ^ METEORITE OR VOLCANO?
- ^ Brügge, Norbert. "The "impact" craters of Mauritania: Aouelloul, Tenoumer, Temimichat and El Mrayer". Archived from the original on 2010-02-23.
External links
edit- Nasa - Image of the Day February 17, 2008
- Meteorite impact structures
- Additional Images of Tenoumer crater
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