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.

The south flank of the Santa Catalina Mountains north of Tucson has a distinctive archlike form, as revealed here by the skyline profile. This form is characteristic of metamorphic core complexes such as the Santa Catalina and Rincon Mountains. Photo by Jon Spencer