63.3 MB (9.8 MB compressed)
5760 x 3840 pixels
48.8 x 32.5 cm ⏐ 19.2 x 12.8 in (300dpi)
JIM WEST / SCIENCE PHOTO LIBRARY JIM WEST / SCIENCE PHOTO LIBRARY
Sauropod dinosaur rib fossil. Excavated fossil of a partial rib bone from a sauropod dinosaur. This specimen has been uncovered at the Cleveland-Lloyd Dinosaur Quarry, Cleveland, Utah, USA. 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. Dinosaur fossils found here include the carnivorous Allosaurus, trapped in a sticky mud deposit, a form of predator trap. Photographed in July 2015.
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