Impact melt rocks from the 1.9 km diameter, simple bowl‐shaped Tenoumer impact crater in Mauritania have been analyzed chemically and petrologically. Tenoumer crater. Diameter – 1.9 km, depth 110 m, age – approximately 21,400 years. The crater is located in the western Sahara Desert.It is 1.9 km (1.2 mi) in diameter and the age is estimated to be 21,400 ± 9,700 years old, placing it in the Pleistocene epoch.. When you see Tenoumer from satellite imagery, it’s hard to imagine anything other than a meteorite made this perfectly round crater in the Sahara desert. Citing Literature. (2003). Browse All Figures Return to Figure. Thirty-fourth Lunar and Planetary Science Conference. Once Tenoumer’s origin as an impact crater was understood, geologists began to wonder whether it resulted from a multiple impact event. Waterfalls The Ouarkziz Impact Crater is located in northwestern Algeria, close to the border with Morocco. The crater was formed by a meteor impact less than 70 million years ago, during the late Cretaceous Period of the Mesozoic Era, or “Age of Dinosaurs.”.
Open navigation Open search. Potassium‐argon age determinations on the melt rock establish the age of the Tenoumer crater as 2.5±0.5 m.y. Journal list menu . The weighted mean apatite fission track age for Tenoumer converge to 21.4±9.7 Ka.
Tenoumer crater, Mauritania: Age and petrologic evidence for origin by meteorite impact. *FREE* shipping on qualifying offers. The age of Tenoumer crater, Mauritania, revisited (abstract #1183). Examination of Tenoumer and Aouelloul craters showed that they formed at different times and therefore could not have resulted from the same impact event. A previously published K-Ar age of 2.5±0.5 Ma might imply that K-Ar ages of young impact craters on old targets are systematically affected by inherited radiogenic Ar. TENOUMER CRATER, MAURITANIA: AGE AND PETROLOGIC EVIDENCE FOR ORIGIN BY METEORITE IMPACT (Pamphlet) [French, Bevan M., et al] on Amazon.com. Details. Crater Name Location Latitude Longitude Diameter (km) Age (Ma) Exposed Drilled Targed Rock** Bolid Type*** Tenoumer: Mauritania: N 22° 55' W 10° 24' 1.9: 0.0214 ± 0.0097: Y: N: M - Remove maintenance message. Volume 75, Issue 23.
Temimichât-Ghallaman crater – F’dérik. By continuing to browse this site you agree to us using cookies as described in About Cookies. Pages 4396-4406. The crater was formed by a meteor impact less than 70 million years ago, during the late Cretaceous Period of the Mesozoic Era, or “Age of Dinosaurs.”. A previously published K-Ar age of 2.5±0.5 Ma might imply that K-Ar ages of young impact craters on old targets are systematically affected by inherited radiogenic Ar. The crater is exposed at the surface and is nearly circular. TENOUMER CRATER, MAURITANIA: AGE AND PETROLOGIC EVIDENCE FOR ORIGIN BY METEORITE IMPACT (Pamphlet) The crater was first described by [3] and interpreted as the result of an explosion of post fihamadafl age. Tenoumer crater, Mauritania: Age and petrologic evidence for origin by meteorite impact. Possible impact crater with well visible circular crater rims. Skip to main content; Log in / Register Pleistocene age for the calcareous sedimentary cover of the Reguibat Shield, there are no specific age constraints for the sedimentary succession at Tenoumer. We only know that is older than the crater. Together with Temimichat-Ghallaman and Aouelloul, two other Mauritanian craters, Tenoumer is Download Citation | The Age of Tenoumer Crater, Mauritania, Revisited | The weighted mean apatite fission track age for Tenoumer converge to 21.4±9.7 Ka. Tenoumer crater – Tiris Zemmour. ... We calculated a weighted mean age of 1.57 ± 0.14 Ma for these new results. The Temimichat crater is located in northern Mauritania and has been listed together with other Mauritanian craters or crater-like features. In the crater area, target rocks and impact melt breccias were recognized in … Geological origin is not clear. Storzer, D., Selo, M., Latouche, L., and Fabre, J. [2] [3] The crater is exposed at the surface and is nearly circular. Its age is still unknown, but the present erosional level suggests a relatively old age of formation. Due to the rare occurrence of fused igneous materials outside the crater, fibasaltfl [1,3], firhyodacitefl [4], a volcanic origin was favored. The crater is located in the western Sahara Desert. 1.9km wide and with a 100m high rim, the best estimates for the age of Tenoumer Crater place it between 10,000–30,000 years old. Tenoumer impact crater, Mauritania 1657 Pleistocene times (Gasse 2000) and considering the relationship between climate evolution and geomorphological forms (e.g., precipitation rate versus erosion rate), the previous age of about 2.5 Ma, as suggested by French et al. Tenoumer is an impact crater in Mauritania.