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.
March 2013 | southern Bradshaw Mountains | Yavapai County.
Framework-supported Miocene conglomerate composed of subrounded to subangular granitoid pebbles, cobbles, and boulders with interstitial sandy, orange-red, arkosic matrix. This is the basal unit of the Tertiary section in the southern Bradshaw Mountains. The clasts become more angular down-section as this rock grades to boulder-cobble sedimentary breccia, which unconformably overlies weathered and oxidized Paleoproterozoic granodiorite.
(Photo by Brad Johnson.)