South-eastern Mauritania Research Articles

L'érosion dans le Dhar Ou Senn (Mauritanie du S.-E.)

Abstract. — The Dhar Ou Senn presents as a sandstone bridge following to the east the Tagant Plateau (South-eastern Mauritania). It looks as a bridge between the Majabat al Kondra and Aouker sand seas. It is made of two landscapes. The northern slope, with sandstones on the foreground, keeps some patches of an ancient ferrugineous Cuirasse. The southern one, a true (Cretaceous ?) cuesta is evoluting with alternate erosive systems. Moisty systems give diatomile-lakes against the lower slopes of the cuestas and arid systems - like the today one, along the slopes glacis with block cover. Torrential forms are of the same kind than these of non tropical mountains.