TED KINSMAN / SCIENCE PHOTO LIBRARY TED KINSMAN / SCIENCE PHOTO LIBRARY
Several camarasaurus vertebrae are covered by plaster in preparation for removal from the site for study. This fossil is from the Jurassic-age Morrison formation in Wyoming. Camarasaurus was a long-necked, long-tailed giant herbivore, measuring about 24 to 65 feet long and weighing up to 20 tons.
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