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.)
Online Resource:
Ferguson, C.A. and Johnson, B.J., 2014, Geologic map of the western half of the Columbia 7 ½' Quadrangle and the eastern half of the Copperopolis 7 ½' Quadrangle, Yavapai County, Arizona. Arizona Geological Survey Digital Geologic Map DGM-109, scale: 1:24,000. https://library.azgs.arizona.edu/item/ADGM-1552427953423-989
Photographer: Brad Johnson
Photo Date: 2013