Geology and Soils of Foxes Lair

Foxes Lair is remarkably variable for a for a small reserve, but is essentially a gravelly plateau adjoining Williams Road bounded by breakaways then an east-west valley and then a high east-west ridge with rock outcrops, plateau, and variable soils. The dramatic changes in slope, soils and vegetation are due to geology and the local plants.
Narrogin and Foxes Lair sit on a huge ancient rift in the underlying granite called the Binneringie Dyke, from which, welled mafic (black iron-rich rocks that form red clay soil) and felsic (whitish silica -rich rocks that form sandy soils.) magma. Today's mosaic of mesas, breakaways, rock outcrops and vegetation types  reflect cycles of erosion, and laterite and soil formation of these rocks.
Below is a map showing facilities over basic soil and rock types and a slideshow
Further information
Why are Western Australia's Plants and Soils Unique?
Mesas and Breakaways in the Narrogin District
Binneringie Dyke