Dave Thayer

Dave Thayer is the author of A Guide to Grand Canyon Geology along the Bright Angel Trail, Field Guide to Geology along the Bright Angel Trail, and Checklist of the Wildlife of the Grand Canyon. He lives with his wife, Dora, in Williams, Arizona.

Dave Thayer is the author of A Guide to Grand Canyon Geology along the Bright Angel Trail, Field Guide to Geology along the Bright Angel Trail, and Checklist of the Wildlife of the Grand Canyon. He lives with his wife, Dora, in Williams, Arizona. See less