The influence of parent rock factor on some engineering index properties of three residual lateritic soils in Southwestern Nigeria

Abstract

Soils derived from sandstone, migmatite-gneiss and quartz-schist in the vicinity of sections of the Lagos-Ibadan expressway in Southwestern Nigeria were investigated. The investigation was meant to determine the extent to which the parent rock factor has controlled some basic engineering index properties of the derived soils. Field and laboratory investigations showed that the mineralogy and texture of the parent rocks show distinct variation from one rock type to another.