GeoSnaps - Image of the Day
Geologic snapshots capturing Arizona’s geologic setting and mining history with a picture of the day from 1 January through 31 December 2013.
Check out previous GeoSnaps/Images of the Day.

August 25, 2007 | Monument Valley, Arizona | The Canyon De Chelly sandstone makes up most of the monuments in Monument Valley National Monument. The underlying Organ Rock shale gives away to erosion more easily than its overlying sandstone. | Photo by Brian F. Gootee