Numerous hikers every day pass by the fallen boulder along the Bright Angel Trail in Grand Canyon National Park.
It may otherwise go undetected except for the 28 indentations– sloping footprints left by a little, reptile-like creature about 310 million years earlier– that cover the rock’s extensive surface area.
“It’s the earliest trackway ever discovered in the Grand Canyon in a period of rocks that nobody idea would have trackways in it, and they’re among the earliest reptile tracks in the world,” stated Steve Rowland, UNLV professor of geology who is studying the fossil trackways.
<< img class ="caption"src ="
/wp-content/uploads/2018/11/NC_RowlandsReptile.jpg”alt =””title =”An illustration by Stephen Rowland of the reptile-like creature making the tracks.”/ >