Approximately 4 km in diameter, this intrusion consists of peralkaline granite and quartz syenite intruded into Precambrian granite and gneiss, the contacts being either tectonic or concealed beneath alluvium. Dykes of solvsbergite, bostonite and other microsyenites are particularly abundant in the country rocks.
EL RAMLY, M.F., BUDANOV, V.I. and HUSSEIN, A.A.A. 1971. The alkaline rocks of south-eastern Egypt. Geological Survey of Egypt, Paper, 53: 1-111.