Four types of Jurassic dinosaurs left more than a thousand footprints and tail-drag marks at a remote site in northern Arizona, a new study revealed. Researchers also mentioned that probably around 190 million years ago, during the Jurassic period, this area was an oasis surrounded by a vast desert. Even if the footprints are clear, researchers are receiving mixed reactions from paleontologists, with doubts about the tracks’ authenticity.

The animal tracks go along the Arizona – Utah state line and that’s made scientists call the area a “dinosaur dance floor.” Furthermore, it seems that there are more than 1,000 tracks at the site, in Vermilion Cliffs National Monument. In some places, there are even a dozen footprints in a square yard. Researchers identified four kinds of tracks, but without a bone or something similar, they can’t possibly know which species left them. Some footprints measure 16 inches across and have three toes and a heel. The other tracks are smaller and rounder.

Marjorie Chan, a geology professor that participated in the study, told the media: "Get out there and try stepping in their footsteps, and you feel like you are playing the game 'Dance Dance Revolution' that teenagers dance on. This kind of reminded me of that because there are so many tracks and a variety of different tracks." The newly discovered site is part of a protected wilderness area that also includes a geologic formation called “The Wave,” a gallery of striped, twisted sandstone. Chan and her colleagues described the dinosaur track site in the October issue of the international paleontology journal Palaios.