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                                            Dinosaur "Dance Floor" Found in Arizona






Rebecca Carroll
for National Geographic News

October 21, 2008
At least four types of Jurassic dinosaurs left more than a thousand footprints and tail-drag marks at
a remote site in northern Arizona, according to a new study.

About 190 million years ago, during the Jurassic period, the area was likely an oasis surrounded by a vast desert, researchers said.

"All these footprints at a watering hole might tell us something about the social life of the dinosaurs," said Marjorie Chan of the University of Utah.

Chan wonders which species might have mingled at this "dinosaur dance floor."

She co-authored the study with University of Utah graduate student Winston Seiler, who found the site in 2006.

(Related: "First Dinosaur Tracks Found on Arabian Peninsula" [May 20, 2008].)

But the research has received mixed reactions from area paleontologists, with some doubting the tracks' authenticity.

Their work appears this month in the journal Palaios.