A dinosaur footprint preserved in the sandstone of the Ashdown Formation on the foreshore at Bexhill-on-Sea, East Sussex. The track dates to the Early Cretaceous period around 135 million years ago, when this area was a muddy river floodplain rather than coastline. Coastal erosion has revealed this ancient surface where dinosaurs once walked, preserving both footprint impressions and natural casts in the rock.