Arizona Geological Society

June 2018 - Gary Huckleberry, The Geoarcheology of Ancient Water Control in the Southwest:  Lessons from the Past

May 2018 - William B. White, The Science of Caves and Cave Contributions to Science

April 2018 - Volker Spieth and Stanley B. Keith, Finding Gold in the Kupferschiefer

March 2018Joe Wilkins, Jr., Retired Consulting Geologist, Piedras Verdes and Cuatro Hermanos, Sonora, Mexico - A Tale of Two Porphyries

February 2018 - Paul F. Hlava, Access to Gems and Minerals, Causes of Color in Minerals and Gemstones

January 2018 - Peter L. Ward, Retired, U. S. Geological Survey, Bringing Peace to the Climate Wars


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