Cross bedded outcrops of the Tapeats Sandstone
Credit: UNM Newsroom
Karl Karlstrom sitting on cross bedded outcrops of the Tapeats Sandstone that was deposited at sea level 500 million years ago and is now exposed deep in Grand Canyon.
Credit: UNM Newsroom
Karl Karlstrom sitting on cross bedded outcrops of the Tapeats Sandstone that was deposited at sea level 500 million years ago and is now exposed deep in Grand Canyon.