World’s Deepest Dinosaur Fossil: 2,256-Metre Plateosaurus Bone Pulled from Beneath the North Sea

In one of the most extraordinary accidental discoveries in paleontology, a tiny 4-centimetre knucklebone belonging to a Plateosaurus has been confirmed as the deepest dinosaur fossil ever found — recovered from 2,256 metres (7,400 feet) beneath the North Sea seabed at Norway’s Snorre oil field.

The specimen was extracted in 1997 during routine drilling by Statoil (now Equinor) from the Late Triᴀssic Lunde Formation (~210–195 million years old). At the time the region was part of a vast river floodplain on the supercontinent Pangaea, not open ocean. The 9-metre, 4-tonne herbivore lived and died on land; after death its bone was rapidly buried in river-channel sediments.

Over the next 200 million years, plate tectonics and relentless sedimentation did the rest. As the Atlantic Ocean opened, the crust beneath the former floodplain subsided dramatically while new layers of sediment piled on top, pushing the fossil more than two kilometres beneath what is now the North Sea floor.

This find remains Norway’s only confirmed dinosaur fossil and sets an unbreakable world record for depth. It perfectly illustrates how terrestrial remains can end up in extreme offshore settings through normal geological processes — river transport, sea-level change, and tectonic subsidence — rather than any aquatic lifestyle or catastrophic flood.

Experts continue to cite the Snorre Plateosaurus as a textbook example of deep-time geology. From the black depths of the North Sea, this lone bone emerges as powerful proof that dinosaurs once walked where oil rigs now drill, and that Earth’s crust is constantly reshaping the map of ancient life.