JIM WEST / SCIENCE PHOTO LIBRARY JIM WEST / SCIENCE PHOTO LIBRARY
Allosaurus dinosaur fossil display. Replica Allosaurus fossil skeleton in the visitor centre at the Cleveland-Lloyd Dinosaur Quarry, Cleveland, Utah, USA. This carnivorous predator reached lengths of 12 metres. More than 12,000 Jurassic-era dinosaur bone fossils have been found at this site, which is part of a geological formation called the San Rafael Swell. The first major excavations at this site took place in the 1920s. It was designated a US National Natural Landmark in 1965. Fossils found here formed when dinosaurs were trapped in a sticky mud deposit, a form of predator trap. Photographed in July 2015.
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