Tegama

…the Sokoto River) and the Tegama—a tableland of sandstone, ending, toward the Aïr, at the Tiguidit scarp. To the east the underlying rock reappears in the Damagarim, Mounio, and Koutous regions, to the north of which is the region of Damergou, consisting of clays. In the Manga region, in the…