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.
December 30, 2008 | Near Sedona, rocks of Permian age dominate the landscape. Here the state's second grandest landform (after the Grand Canyon) is exposed in colorful cliffs known as the Mogollon Rim. The Rim is nearly 200 miles long and reaches its western terminus near Sedona. The rocks here are similar to those exposed in the upper one-third of the walls of Grand Canyon. In the photo from top to bottom is the white-colored slope of Kaibab Limestone, in sharp contact with the sheer cliff of the underlying Toroweap Formation, again underlain by a cliff-forming unit of Coconino Sandstone. The red rocks belong to the Schnebly Hill Formation, which is the only unit not present in the Grand Canyon. The houses of the city shown at the bottom of the photograph are built upon the easily eroded surface of the Hermit Formation. (Photo by Wayne Ranney)