The Agere Mariyam map sheet is bounded by longitudes 37° 30' and 39° 00' E and latitudes 5 and 6 (Fig. 1). The western and southern parts of Agere Maryam map sheet fall in North Omo and Borena administrative regions, respectively. The northern, eastern and southeastern parts of the map sheet are included in Sidamo administrative region. The towns of Agere Maryam, in the center, and Kibre Mengist, in the northeast, are the major ones in the map sheet. They fall within Borena and Sidamo administrative regions, respectively. The map sheet is covered by widely distributed precambrian basement rocks of both stratified and intrusive derivatives, Cenozoic volcanic sequences and Quaternary covers.