The Canyon is a Book of Revelations in the rock-leaved Bible of geology. - John Wesley Powell A professor of geology at Illinois Wesleyan, John Wesley Powell had more than just a passing ...

Current projects include study of the surface uplift history of the Colorado Rockies, the incision history of the Grand Canyon, and deciphering when and why Australia’s Great Escarpment formed. I love ...

As the elevation descends, the park transitions from pristine evergreen forest to stark desert landscapes with 1.8 billion years of geology. Native Americans have lived in and around the canyon ...

The Grand Canyon harbors a healthy population of bighorn sheep, but they are most likely seen while hiking deep into the canyon or running the Colorado River. Mule deer and javelina wild pigs inhabit ...

A team of USGS researchers in Flagstaff are working to develop an all new geologic map of the Grand Canyon region.

It’s not unusual for a hike in California to leave a lasting impression, but after the secretary of the interior toured a geological wonder near Palm Springs last year, the experience directly led to ...