This intrusion forms a cone-shaped mountain about 3 km in diameter surrounded by alluvium. The central area consists of peralkaline syenites that pass gradationally into an outer zone of mesocratic syenites and quartz syenites containing abundant xenoliths. Radial solvsbergite and grorudite dykes cut the country rock biotite granites and gneisses. Three rock analyses are given by El Ramly et al. (1971).