Ol Kokwe and the three other smaller islands in Lake Baringo constitute a volcanic complex that may be considered as a southerly outpost of the Korosi volcano (No. 085-00-034). Ol Kokwe consists mainly of coalescing basaltic scoria cones but the most southerly part is built of trachytes, which also form the island of Parmalok.
DUNKLEY, P.N., SMITH, M., ALLEN, D.J. and DARLING, W.G. 1993. The geothermal activity and geology of the northern sector of the Kenya rift valley. British Geological Survey, Research Report. International Series SC/93/1: 1-185.HACKMAN, B.D. 1988. The geology of the Baringo-Laikipia area. Report, Geological Survey of Kenya, 104: 1-47.