Stair Hole

Stair Hole is a spectacular geological wonder next to Lulworth Cove, featuring a partially collapsed sea cave creating a natural amphitheatre. The site demonstrates textbook examples of geological folding where horizontal rock layers were compressed into vertical and curved formations during tectonic movements millions of years ago. The hole’s name derives from step-like rock layers resembling stairs. Lulworth Crumple, as the folded rocks are known, allows visitors to observe geological processes normally hidden underground. The small cove displays multiple rock types including Portland limestone, Purbeck beds, and Wealden clays in dramatic juxtaposition. Geologists and students regularly visit studying coastal geomorphology and structural geology. The site shows Lulworth Cove’s evolutionary predecessor – Stair Hole will eventually erode into a similar horseshoe cove thousands of years hence. This dynamic landscape makes geology accessible and fascinating for non-specialists while providing research value for professionals.