Revision of Precambrian stratigraphy in the Prescott-Jerome area, Yavapai County, Arizona

_________________________________________________________ Cl Introduction. _____________________________________________________ 1 Ash Creek Group.________________________________________________ 3 Big Bug Group_-__------_---_------_-_-_-------------_--_-_---__7 Chaparral Volcanics-__________________________________________ 8 Green Gulch Volcanics.________________________________________ 8 Texas Gulch Formation.___________________________________________ 10 Brady Butte Granodiorite_-___---______--___-___--__--__--___--_-_11 Isotopic studies.__________________________________________________ 12 Abandonment of name Alder Group in this area ______________________ 14 Yavapai Series..___-_-___-_--_-______-_-__--__-___--______----_-_15 References _______________________________________________________ 16