Half of them occur in the vicinity of Lake Hamilton on the seaward side. Several large dry sinkholes occur a short distance inland of Talia, further up the coast. Other features occur in Cape Wiles NP near Port Lincon and some sea caves exist in limestone at Elliston and on Wedge Island in Spencers Gulf. This large region has relatively few caves which occur in isolated pockets of old crystalline limestones and dolomites outcropping throughout the Range Complex. Cave development tends to be more horizontal than vertical although there are some potholes and shaft entrances.
Several caves feature rather extensive horizontal joint controlled mazes.
The water table is exposed in a few caves. There are 180 recorded cave features in the Flinders Ranges. There are also a large number of mines in the region that intersect natural cave development. Kangaroo Island Caves occur in aeolian calcarenite of Pleistocene age along the south and west coasts. In most caves, the limestone is similar to, but much more loosely consolidated than the older Tertiary limestones of, for example, the Upper and Lower South East region.