Rocks Above the Clouds: A Hiker's and Climber's Guide to Colorado Mountain Geology (Colorado Mountain Club Pack Guides)
JACK REED, a Scientist Emeritus at the USGS, has written popular books on the geology of the Appalachians, the Tetons, and the Alaska Range. He is a long-time member of CMC and currently teaches geology, map reading and GPS for the Denver Group. GENE ELLIS is a geologist with the USGS and the owner of a substantial climbing resume.