|Data from Klajnik Krisztian message (Krisztian Klajnik - an amateur astronomer from Hungary):
"The circular feature on the Mangueni Plateau of the North Niger is
eroded impact crater or salt diapir. The circular structure 1.7 km in
diameter and 5-10 m deep. It checked on geological map and satellite
images. The Mangueni Plateau (Plateau de Mangueni) is southern extension
of the Murzuq Basin. The basin is by floored Archean basement rocks.
It's filled with Cambrian to Carboniferous sediments and Jurassic to
Cretaceous sediments. Bedrock is made Cretaceous sandstones, so the
structure age probable is Cretaceous or younger."
(Sent: March 30, 2010)
Спутниковая фотография кратера из Google Earth.
SRTM map 6x6 km (greenish <= 813 m and grayish >= 830 m) with structure contour.