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The Green River Formation was formed by a system of three fresh water lakes which covered parts of Colorado
Wellnhofer in 1974
The muscle attachment sites on the back of the skull were quite small
segmented body with a flexible carapace covering the thorax and head
The only species yet assigned to this taxon
Ursus spelaeus, Cave Bear Skull & Lower Jaws Stegosaurus The Green River Formation wasThe cave bear (Ursus spelaeus) was a species of bear that lived in Europe and Asia during the Pleistocene and became extinct about 24,000 years ago during the Last Glacial Maximum. Both the word "cave" and the scientific name spelaeus are used because fossils of this species were mostly found in caves. This reflects the views of experts that cave bears may have spent more time in caves than the brown bear, which uses caves only for hibernation Many
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