Calcite

layer formed. This was followed by a general drying of the climate which prevented significant erosion of the surface. A wet phase 5-3 MYA led to the formation of the Nullarbor caves as the limestone dissolved and stalagmites and stalactites of calcite grew. Caverns continue to enlarge as salt crystals corrode rock walls. (12) During the Miocene period (23 – 5 MYA), these events led to flora and fauna which were tolerant of heat, lack of water and alkaline soil due to calcium carbonate…