Arizona Geological Society

March 2017 - Derek Thorkelson, Professor, Simon Fraser University, The Precambrian Tectonic Connection between Yukon and Arizona

February 2017 - Daniel Hummer, Assistant Professor/ Southern Illinois University, Carbondale, Mineral ecology and evolution: Using large datasets to tell the story of the co-evolution of Earth and life

January 2017 - David A. Sawyer, Professor, University of Colorado, Boulder, Dating Geologic time in the Cretaceous: Integrating Biostratigraphy, Isotope Geochronology, and Astrochronology in Sedimentary Deposits of the Cretaceous Western Interior Seaway

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