Full Title: Cambrian Earth systems in western Laurentia and Tonto Group of the western Grand Canyon Region
Endorsed by: GSA’s Geochronology Division
Led by: Carol Dehler, Karl Karlstrom, Stephen Rowland
Date: Wed.-Sat. 15–18 Oct. 2025
Time: 5:00 p.m. (first day); 12 p.m (last day)
Location: Las Vegas, Nevada, USA
CEUs: 2.4
Explore the iconic Cambrian Tonto Group strata in westernmost Grand Canyon and near Las Vegas to discuss results of new research and implications for long-standing questions about Cambrian Earth systems. Topics include the Sauk transgressions, the Great Unconformity, Cambrian subsidence mechanisms, a sequence stratigraphy re-interpretation of Eddie McKee’s classic Tonto Group stratigraphy, new biochronology, precise geochronology, and C-isotope chemostratigraphy. How do new datasets from the Grand Canyon inform understanding of the Cambrian Earth System and its rapid, ever-shrinking Time Scale? Cost includes transportation (mini vans), one night in Las Vegas (double occupancy) and two nights at the Dude Ranch (double occupancy) which includes meals, snacks and water, and boat usage.
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Learn more about this and other GSA Connects 2025 events.
For additional information, please contact Rebecca Taormina, rtaormina@geosociety.org, GSA Field Trip and Short Program Coordinator.
Product Code: FT25CN404
Product Category: FTRIP