Research by paleontologists confirmed that a series of recently discovered fossil tracks in Grand Canyon National Park are the oldest of their recorded in the region.
CNN  — 

Finding fossil footprints at the Grand Canyon isn’t particularly unusual. The expansive stretch of red rock is home to an array of formations containing preserved remains of the past.

But a discovery made by a geology professor turned out to be a bigger deal than he could have imagined: what he stumbled upon were the oldest vertebrate fossil tracks ever found at Grand Canyon National Park – about 313 million years old.

Geologist Allan Krill, a visiting professor from Norway at the University of Nevada, Las Vegas (UNLV), came across a boulder marked with set of fossil footprints while on a hike with students in 2016, according to a news release this week from the park.