Tenoumer crater
Impact crater in Mauritania
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Tenoumer is considered to be an impact crater in Mauritania. Wikipedia
Age: 21,400 ± 9,700
Coordinates: 22°55′5″N 10°24′27″W / 22.91806°N 10.40750°W
Diameter: 1.9 km (1.2 mi)
Depth: 110 m (360 ft) (currently exposed); 300 to 400 m (980 to 1,310 ft) (originally)