ocr: - 48 Dinosaur Mummy - - THIS SO-CALLED DINOSAUR MUMMY IS A fossilized imprint of the carcass of a duck- billed dinosaur that lived about sixty-five million years ago, Edmontosaurus annectens (ed-mon-to-so-rus ah-nek-tenz), reptile from the Edmonton Formation. What we know about most extinct vertebrates comes solely from tossilized bones and teeth, and the discovery of fossilized skin is rare. This remarkable specimen is called a "mummy" because, though no actual skin is preserved, it left impressions of skin and other soft tissues in the surrounding rock. It is mounted as it was found, lying o ...