Latest Articles

Spencer Titley

Interview with Dr. Spencer Titley, Professor of Geosciences Emeritus, Department of Geosciences, University of Arizona, on the history of porphyry copper exploration in Arizona.

Lee Allison's 2013 Arizona Geology Blog

Some of the top geologic stories from Lee Allison’s Arizona Geology blog for 2013.

"Head of the Grand Canyon" woodcut image

In this article, we present some of the highlights of the geological exploration of Arizona, focused on the role of early surveys by the U.S. Government and later geologic studies by the USGS and the AZGS and its predecessors.