Allosaurus skull, Late Jurassic Period, Dinosaur National Monument, Utah, USA

Found in 1924 at Carnegie Quarry in Dinosaur National Monument, this large fossil Allosaurus head from the Late Jurassic Period (149 million years ago) is one of the best-preserved skulls ever discovered. The theropod (meaning "beast-footed") dinosaurs are a diverse group of bipedal saurischian ("lizard-hipped") dinosaurs. Therapods include the largest carnivores ever to have walked the earth. Not all dinosaurs are extinct, since birds are actually the descendants of small nonflying theropods. In Dinosaur National Monument, the popular Carnegie Dinosaur Quarry displays a spectacular fossilized logjam of Jurassic dinosaur bones in Utah, USA.

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Filename: 1503SW-2220_Allosaurus-skull.jpg
Copyright: © Tom Dempsey / PhotoSeek.com
Image Size: 6000x4000 / 8.1MB; http://www.photoseek.com/; Animalia Reptilia animal history past reptile vertebrate
Contained in galleries: Utah: Dinosaur National Monument, 2015 Mar 3-Apr 8: all: Utah, Colorado hikes

Found in 1924 at Carnegie Quarry in Dinosaur National Monument, this large fossil Allosaurus head from the Late Jurassic Period (149 million years ago) is one of the best-preserved skulls ever discovered. The theropod (meaning "beast-footed") dinosaurs are a diverse group of bipedal saurischian ("lizard-hipped") dinosaurs. Therapods include the largest carnivores ever to have walked the earth. Not all dinosaurs are extinct, since birds are actually the descendants of small nonflying theropods. In Dinosaur National Monument, the popular Carnegie Dinosaur Quarry displays a spectacular fossilized logjam of Jurassic dinosaur bones in Utah, USA.