Tenoumer crater: Difference between revisions
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{{Short description|Impact crater in Mauritania}} |
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[[Image:Tenoumer.jpg|thumb|200px|right|[[Landsat]] image of the Tenoumer crater; screen capture from [[NASA World Wind]]]] |
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{{Infobox terrestrial impact site |
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[[Image:Tenoumer x3.jpg|thumb|200px|right|Oblique [[Landsat]] image of Tenoumer crater draped over digital elevation model (x3 vertical exaggeration); screen capture from [[NASA World Wind]]]] |
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| name = Tenoumer crater |
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| other_name = |
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| photo = Tenoumer Krater.jpg |
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| photo_caption = |
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| map = Africa |
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| map_caption = Asteroid impact location in Africa |
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| ⚫ | |||
| confidence = Confirmed |
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| diameter = {{cvt|1.9|km}} |
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| depth = * {{cvt|110|m}} (currently exposed)<br> |
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* {{cvt|300|to|400|m}} (originally) |
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| age = 21,400 ± 9,700 |
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| exposed = |
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| drilled = |
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| imp_size = |
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| bolide = |
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| country = [[Mauritania]] |
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| state = |
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}} |
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'''Tenoumer''' is an [[impact crater]] in [[Mauritania]].<ref>{{cite Earth Impact DB | name = Tenoumer| accessdate = 2009-08-16}}</ref> |
'''Tenoumer''' is considered to be an [[impact crater]] in [[Mauritania]].<ref>{{cite Earth Impact DB | name = Tenoumer| accessdate = 2009-08-16}}</ref> |
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==Details== |
==Details== |
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The crater is located in the western [[Sahara Desert]]. It is {{cvt|1.9|km||}} 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.<ref>{{cite journal |url=http://www.lpi.usra.edu/meetings/lpsc2003/pdf/1183.pdf |publisher=The Meteoritical Society |title=Tenoumer impact crater, Mauritania: Impact melt genesis from a lithologically diverse target |journal=Meteoritics and Planetary Science |year=2016 |volume=51 |issue=2 |pages=323–350 |last1=Schultze |first1=Dina Simona |last2=Jourdan |first2=Fred |last3=Hecht |first3=Lutz |last4=Reimold |first4=Wolf Uwe |last5=Ralf-Thomas |first5=Schmitt |doi=10.1111/maps.12593|bibcode=2016M&PS...51..323S |doi-access=free }}</ref> |
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The crater is located in the western [[Sahara Desert]]. It is 1.9 km in diameter and the age is estimated to be 21,400 ± 9,700 years placing it in the [[Pleistocene]]. |
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<ref>{{cite web |
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|url=http://www.lpi.usra.edu/meetings/lpsc2009/pdf/1281.pdf |
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|publisher=Lunar and Planetary Institute |
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|title=40th Lunar and Planetary Science Conference |
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|year=2009 |
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|chapter=Petrographic Investigation of Ejecta from the Tenoumer Impact Crater, Mauritania |
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|author=S. J. Jaret |
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|coauthors=L.C. Kah, B. M. French |
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}}</ref><ref>{{cite journal |
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|url=http://www.lpi.usra.edu/meetings/lpsc2009/pdf/1183.pdf |
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|publisher=Lunar and Planetary Institute |
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|title=The Age of Tenoumer Crater, Mauritania, Revisited |
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|year=2003 |
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|volume=XXXIV |
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|author=D. Storzer |
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|coauthors= M. Selo, L. Latouche, and J. Fabre |
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}}</ref> |
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The crater is exposed at the surface |
The crater is exposed at the surface and is nearly circular. Edges of the crater rise up to {{cvt|110|m||}} high above the base of the crater, but the bottom of the crater is covered with an approximately {{cvt|200|to|300|m}} thick layer of sediments.<ref>{{Cite web |title=Tenoumer Crater, Mauritania |url=https://www.esa.int/ESA_Multimedia/Images/2022/06/Tenoumer_Crater_Mauritania |access-date=2022-11-20 |website=www.esa.int |language=en}}</ref> |
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Tenoumer crater |
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,<ref>[http://www.wondermondo.com/Countries/Af/Mauritania/TirisZemmour/Tenoumer.htm METEORITE OR VOLCANO?]</ref> but current evidence clearly indicates an impact origin.<ref>{{cite web |author=Brügge, Norbert |url=http://www.b14643.de/Sahara/Mauritania%20Craters/index.htm |title=The "impact" craters of Mauritania: Aouelloul, Tenoumer, Temimichat and El Mrayer |url-status=dead |archiveurl=https://web.archive.org/web/20100223024521/http://www.b14643.de/Sahara/Mauritania%20Craters/index.htm |archivedate=2010-02-23 }}</ref> |
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{{clear}} |
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==References== |
==References== |
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{{reflist}} |
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<references/> |
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* {{cite web |author=Brügge, Norbert |url=http://www.b14643.de/Sahara/Mauritania%20Craters/index.htm |title=The "impact" craters of Mauritania: Aouelloul, Tenoumer, Temimichat and El Mrayer}} |
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==External links== |
==External links== |
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*[http://earthobservatory.nasa.gov/IOTD/view.php?id=8536 Nasa - Image of the Day February 17, 2008] |
*[http://earthobservatory.nasa.gov/IOTD/view.php?id=8536 Nasa - Image of the Day February 17, 2008] |
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*[ |
*[https://web.archive.org/web/20051118163420/http://saharamet.com/expedition/2003/crater.html Meteorite impact structures] |
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*[ |
*[https://www.unb.ca/passc/ImpactDatabase/images/tenoumer.htm Additional Images of Tenoumer crater] |
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{{Impact cratering on Earth}} |
{{Impact cratering on Earth}} |
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[[Category:Pleistocene impact craters]] |
[[Category:Pleistocene impact craters]] |
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[[de:Tenoumer]] |
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{{Earth-crater-stub}} |
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[[fr:Cratère de Tenoumer]] |
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Latest revision as of 00:51, 27 July 2023
| 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 | |
Tenoumer is considered to be an impact crater in Mauritania.[1]
Details
[edit]The 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
 | This article about an impact crater on Earth is a stub. You can help Wikipedia by expanding it. |