John Wesley Powell A professor of geology at Illinois Wesleyan ... and Hermit Shale. The Coconino Sandstone layer was deposited not by the sea, but by wind, which blew in sand across the region.

The weekend of the 2017 solar eclipse, my father and I drove up to Wyoming and stayed with some friends amongst some of the most incredible sandstone geology I've ever seen. That morning, we all hiked ...

"Our research showed that Paleolithic humans sculpted the sandstone to promote specific ... across disciplines—such as archaeology, geology and geomorphology—is vital in science.