Staircase Cave

Staircase Cave GorgeA large ancient cave (Stairway Cave) once existed in what is now a gorge at Pinnacle Point, a formation process typical along coastal cliffs. It was filled with a spectacular series of deposits that are now exposed, unroofed, and include aeolianites, colluvial deposits, cave sediments, and intercalated flowstones. The clean crystalline nature of the calcite points to a subterranean speleothem: some are exposed at the surface and represent either the top of fallen stalagmites that lie within the colluvial talus, or are the eroded tips of in-situ stalactites that were completely surrounded by the upper-most clastic sediments that infilled the ancient cavity.