[3] The Tantantoola cave, which is located within the boundaries of what is now the conservation park, was first discovered in 1930 by local boy Boyce Lane.

[4] The Tantanoola cave is located inside Up and Down Rock, an ancient marine cliff towering over the highway.

The Miocene bryozoan dolomite which underlies the Gambier limestone of the area was once uplifted along the Tartwaup fault-line.

Today the cliff is far from the sea, but shells, pebbles and seal bones left behind by the ocean can be found inside Tantanoola Cave, and witness the marine history.

The marine sediments entered first through cracks and solution tubes until a larger breach occurred.