This cave was created over thousands of years by the effects of water and wind on the limestone rocks formed from layers of dead marine animals between 280 and 360 million years ago. The area was submerged under a shallow, warm sea near the equator, and the hill would have been like a tropical reef.
The name may be a corruption of ‘tors’ (meaning hills), or it may come from Thor, the Norse god of thunder.
Around 20,000 years ago the huge cavern would have been used for shelter by both humans and animals. Bones of bears and giant red deer have been found in the area, and Thor’s Cave is the site of a Bronze Age Burial.
Sue and I visited it yesterday.