Sip back and discover Aust Cliff near Bristol on the River Severn, one of the UK’s most important Rhaetian fossil sites. Designated a Site of Special Scientific Interest, it preserves a near-continuous record from the Late Triassic to Early Jurassic. Famous for its fossil-rich Rhaetic Bone Bed, Aust Cliff reveals marine reptiles, fish, and early dinosaurs, offering rare insights into prehistoric ecosystems shaped by tides, geology, and deep time evolution.