 Clay Ridges and Plateaus also have deep Soils but are far rarer due to lack of representation in the park on these sites the soil is derived from Wianamatta clay and is considered rich land producing good quality forest.On the sides of the steep river valleys that punctuate the uplands the terrain changes to exposed rock with collected pockets of soil.Although still fairly rocky, a large number of eucalyptus and other tree species are prevalent.