?BAKER, B.H. 1958. Geology of the Magadi area. Report, Geological Survey of Kenya, 42: 1-81.FAIRBURN, W.A. 1963. Geology of the North Machakos-Thika area. Report, Geological Survey of Kenya, 59: 1-43.MATHESON, F.J. 1966. Geology of the Kajiado area. Report?. 1958.