Cooper & George

Cooper's humerus boneCooper and George represent the largest dinosaurs to have ever been found in Australia. These specimens are on loan from the Outback Gondwana Foundation in Eromanga, southwest Queensland.

Found in the upper Winton Formation, known as the Cenomanian Epoch of the mid-Cretaceous Period, approximately 95-98 million years ago.

About 2 to 5 million years younger than the Winton dinosaurs (e.g. Diamantinasaurus and Wintonotitan), that come from the lower Winton Formation, known as the Albian Epoch of the mid-Cretaceous.

Cooper and George are titanosaur sauropods. Titanosaurs are one of the last remaining sauropod groups in the Cretaceous Period and also were the largest ever land-dwelling animals.

The bones of Cooper and George are the largest bones of any dinosaur so far discovered in Australia, which makes them the largest bones of any animal to have walked the Australian continent. The humerus is one of the most complete dinosaur bones known.

Based on the lengths of the humerus of Cooper and the femur of George, compared to dinosaurs from overseas, we can estimate the total body length of these dinosaurs to be 24 to 26m. Elliot, based on a single femur is estimated to about 18m, so between 6 to 8m shorter than it’s southern Queensland relatives.

George and Cooper's bones are only 20 to 30cm off being alongside world record holders, like the bones of Argentinosaurus and Paralititan found in Argentina and Africa respectively. Sauropod footprints in Broome, Western Australia, date from the Cretaceous Period and are of similar size to Cooper and George, with some of them possibly being among the biggest footprints in the world.

Titanosaurs have been found across the globe, however, little is known of the Australian dinosaur world.

All dinosaur discoveries found in Australia are most likely going to represent new species because so little has been found until now. George and Cooper represent a new species, different to the species found in Winton.

Silhouette of Cooper showing the bones that have been found

Silhouette of George showing the bones that have been found

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