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It's something like a modern-day chuckwalla, side-stepping sand dunes on an island in what now is Grand Canyon National Park.

A rock tumble at the Grand Canyon revealed fossil footprints that researchers say are among the oldest in the park.

Footprints found on a boulder which had stood in plain view of tourists in the Grand Canyon actually date from an astonishing 313 million years ago, researchers in America have confirmed.

It’s something like a modern-day chuckwalla, side-stepping sand dunes on an island in what now is Grand Canyon National Park.

It’s something like a modern-day chuckwalla, side-stepping sand dunes on an island in what now is Grand Canyon National Park.

Footprints found in the Grand Canyon, Arizona, reveal the journey that two creatures took when they walked up the sand dunes approximately 313 million years ago. The footprints were discovered when a huge boulder fell down in the Pennsylvanian Manakacha Formation, revealing the imprinted tracks.

On a day about 313 million years ago, a four-legged animal took a stroll up the slope of a sand dune, leaving only footprints behind.

Paleontological research has confirmed a series of recently discovered fossils tracks are the oldest recorded tracks of their kind to date within Grand Canyon National Park. In 2016, Norwegian geology professor, Allan Krill, was hiking with his students when he made a surprising discovery. Lying next to the trail, in plain view of the many hikers, was a boulder containing conspicuous fossil footprints. Krill was intrigued, and he sent a photo to his colleague, Stephen Rowland, a paleontologist at the University of Nevada 51³Ô¹ÏÍøÃâ·ÑApp.