Step 4: At the end of the Pleistocene glaciation the climate in Western Australia dried out and warmed up. The vegetation which had been established on the Tamala Limestone and sand dunes died off and the wind continued to blow. This resulted in the gradual deflation (removal of fine sediment by wind, commonl in a desert setting) of the area we now know as the Pinnacles Desert. Where the roots and cracks breached the caliche capping, the wind was able to blow away the loose sand. The intervening caliche capped 'pinnacles' survive.