Siccar Point

Siccar Point is a rocky headland on Scotland’s east coast in the Scottish Borders. It lies near the village of Cockburnspath, where the land juts into the North Sea. The site once held a small hill fort built by ancient Britons. Nearby stands the ruined St Helen’s Chapel, built in Romanesque style from Old Red Sandstone. The chapel’s stone was likely quarried from Greenheugh Bay just west of the point. Old Cambus village once stood closer to the promontory than the present hamlet does. A twentieth-century quarry now occupies the land south of the point, where greywacke was once cut for road building. The point is famous in geology for Hutton’s Unconformity, discovered in 1788 by James Hutton. His observations there proved that rocks form over vast spans of time through slow, steady processes. The site was named the first of 100 global geological heritage sites by the International Union of Geological Sciences in 2022. Beneath the cliffs lie near-vertical Silurian sandstones, about 440 million years old. These are overlain by gently dipping Devonian sandstones, roughly 375 million years old. The gap between them records 65 million years of mountain building and erosion after an ancient ocean closed. Visitors walk along the shore to see the layered rocks exposed by the sea. The unconformity appears where the older, tilted layers meet the younger, flatter ones. The cliffs show how the rocks were folded, uplifted and eroded before being buried again. St Helen’s Chapel ruins stand nearby, built from the same stone as the cliffs. The old quarry hollow to the south now holds a warehouse, marking where stone was once cut. The view across the North Sea and along the coast adds to the sense of deep time visible in the rocks.