April 2025 - Nirio Mendoza Inca, Geology and Hydrothermal Alteration of Red Mountain Lithocap, Eastern Lake City Caldera, Hinsdale County, Colorado, U.S.A. (59 minutes)

March 2025 - Chad Kwiatkowski, Revisting the Arizona Red:  The Lower to Middle Triassic Moenkopi Formation (62 minutes)

February 2025 - Mark Holland, The Ghost of Sutures Past: a Re-evaluation of the Yavapai-Mazatzal Provinces Boundary in Central Ariozna (59 minutes)

January 2025 - Brian Gootee and Tawnya Wilson, Arizona's Deep Subsurface: Exploring energy Resiliency through Gas Storage, Mineral-Sequestration, and Geothermal Energy (65 minutes) 

December 2024 - Steve Reynolds, (Emeritus Professor, Arizona State University) Untangling the Stratigraphy of the Upper Paleozoic Supai and Naco Groups on the Mogollon Escarpment (67 minutes)

November 2024 - Carson A. Richardson (Arizona Geological Survey) Arizona's Role in the Green Energy Transition, Strategic/Critical Minerals, How They will be Sourced - Or Ramblings on Critical Minerals and Thoughts Thereof (53 minutes)

October 2024 - Ann Youberg and Beck Beers (Arizona Geological Survey) Postfire Debris-Flow Research at Arizona Geological Survey:  Efforts to Improve Hazard Assessments (53 minutes)

September 2024 - Travis Snider and Adam Hawkins (Arizona Sonoran Copper Company) Cactus Mine Update:  From Taxpayer Liability to the Top 10 US Copper Producer

May 2024 - Eytan Bos Orent (University of Arizona) - Characterization of Contrasting Ore-Related Fluid Systems in the Paradox Basin (49 minutes)

April 2024 - Brian Gootee and Carson Richardson (Arizona Geological Survey) Basin Evolution, Deformation, and Mineralization in Big Sandy Valley, Northwestern Arizona (78 minutes) 

March 2024 - Jason Ricketts, Ph.D. (Asst. Professor, University of Texas, El Paso) The Origin and Tectonic Significance of the Basin and Range - Rio Grande Rift Boundary in Southern New Mexico (58 minutes)

February 2024 - John Douglas, Ph.D. (Faculty, Paradise Valley Community College, Phoenix, Arizona) New Discovery of Beach Sand, Beachrock, and Tuffa from the Uppermost Portion of the Bidahochi Formation and their Implications for the Development of the Grand Canyon

January 2024 - Dr. Jon Spencer (Adjunct Researcher, Department of Geosciences at the University of Arizona) Cenozoic Tectonic Extension in the Sonoran Desert Region and Reconstruction of the Initial Distribution of Porphyry Copper Deposits (62 minutes)

December 2023 - Dr. Shelby Rader (Department of Earth & Atmospheric Science at Indiana University) From Rocks to Stalks:  Controls on Biogeochemical Signatures and the Application of Trace Metals (44 minutes)

October 2023 - Dr. Amanda Hughes (Assistant Professor of Practice, Department of Geosciences at the University of Arizona) Structural Modeling for Reducing Uncertainty in Geologic Interpretations (58 minutes)

September 2023 - Virginia McLemore (New Mexico Bureau of Geology and Mineral Resources), REE Potential and Origin of the Cambrian-Ordovician Carbonatites and Episyenites in New Mexico, U.S.A. (54 minutes)

May 2023 -  Dr. Hervé Rezeau (University of Arizona), Lithospheric controls on the formation of porphyry copper deposits: What could possibly go wrong? (1 hour & 5 minutes)

March 2023 - Ralph Stegen (Exploration Geologist, Freeport-McMoRan), Magmatism and Characteristics of Hypogene and Supergene Alteration-Mineralization of the Lone Star Porphyry Copper Deposit, Safford District, Arizona (43 minutes)

December 2022 - B. Gootee, L. Thompson, T. Wilson (all from Arizona Geological Society), Dec. 2022, Perspectives on a Carbon Storage Ecosystem Built from Distributed CO2 Sequestration Resources in AZ (1 hour & 10 minutes)

November 2022 - Thomas Ruberto (Arizona State University), Content Learning Outcomes from Geological Virtual Field Trips Can Exceed those from In-Person Field Trips (1 hour & 6 minutes)

October 2022 - Ramon Arrowsmith (Arizona State University), Machine learning, robotic mapping, and particle dynamics for earthquake geology (1 hour)

September 2022 - Tim Marsh (Exploration Geologist Bell Copper), Bell Copper’s Big Sandy Copper Porphyry Discovery (53 minutes)

June 2022 - Dr. Ray Grant (Pinal Geology & Mineral Museum), Mineralogy of Arizona, 4th Edtn. (52 minutes)

May 2022 - K. Constenius and A. Payton (Helium Exploration), Helium Exploration and Exploitation, Holbrook Basin, Arizona (1 hour & 13 minutes)

February 2022 - Presentations by student awardees of AGS Courtright and Allison Scholarships (1 hour & 2 minutes)

Lauren J. Reeher, Understanding Crustal Stress Conditions throughout Geologic Time:  Examples from Laramide on the Colorado Plateau (M. Lee Allison Awardee, 2021)

Eytan B. Orent, Characterization of U(-V) Deposits in the La Sal District, Ut and Co and their Relationship to Paradox Basin Fluid Flow (Courtright Awardee, 2021)

December 2021 - Steven J. Reynolds and Julia K. Johnson, Roadside Geology of Arizona (55 minutes)

November 2021 - Chris Osterman, The 417 Project: A Native Silver Deposit in Globe, Arizona (49 minutes)

January 2021 - J. Rasmussen & S.B. Keith, Mineral District and Evolution in Arizona – Exploration Potential (47 minutes)

May 2020 - Philip Perrson, The Detroit City Portal: New Chapter in the Story of Sweet Home Mine, Colorado, Rhodochrosite Mining (55 minutes)