Dinosaur bones found in Alaska’s Denali National Park
A fresh analysis of four fossilized bone fragments that were unearthed in the Denali National Park has provided new evidence that the Alaskan park was once roamed by dinosaur, the National Park Service announced.
Apart from those fossilized bone fragments, including an ossified tendon, a team of researchers from the University of Alaska have discovered a number of impressions of the extinct huge animals' footprints.
Pat Druckenmiller, a curator of Earth sciences at the university's Museum of the North, said the new study suggested that tendon fragments belonged to a hadrosaur -- duck-billed enormous herbivorous dinosaurs that were the most abundant large animals in the region.
Explaining why they think the remains belonged to dinosaurs, the researchers wrote, "Another larger fragment is composed of spongy bone originating from the end of a large animal's limb. This microstructure shows the bone didn't come from a crocodile or other slow-growing, cold-blooded animal. It is clearly from a medium-sized to large dinosaur."
They also estimated Alaska was roamed by dinosaurs as many as 70 million years ago, during the Cretaceous period.
The research, funded by the National Park Service, is a joint effort of the UA Museum of the North and Denali National Park.
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