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Proterozoic

Bighorn Fire smoking the Catalina mtns.
Geology & Mineral Resources of the Santa Catalina Mountains, SE Arizona
Minerals & Mining
News
 - 26 June 2020
A 145-page monograph on the geology and mineral resources of the Santa Catalina Mtns. by Dr. Eric Force (1997).
The distribution of mapped quadrangles in the Bradshaw Mountains of Arizona's Transition Zone.
Arizona’s Proterozoic Geology Revealed: Geologic maps of Phillip Anderson
Minerals & Mining
News
 - 18 December 2017

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