Full Title: Subduction, underplating, and exhumation in a hot subduction zone
Endorsed by: GSA’s Structural Geology and Tectonics, Mineralogy, Geochemistry, Petrology, and Volcanology Divisions
Led by: John P. Platt, Frances Cooper, Justine Grabiec
Date: Wed–Sat. 15–18 Oct. 2025
Time: 8:45 a.m. (first day) – 8:45 a.m. (last day)
Location: Santa Catalina Island, California, USA
CEUs: 2.4
The trip will explore the structure and petrology of the Catalina Schist terrane on Santa Catalina Island, California. The island exposes rocks of oceanic origin metamorphosed under various grades from lawsonite-blueschist to upper amphibolite/eclogite, in a series of tectonic slices, separated in part by ultramafic melange carrying high-grade blocks. The trip will consider the implications of the inverted metamorphic sequence and the significance of the tectonic contacts in terms of the thermal and mechanical evolution of the subduction complex during subduction, underplating, and exhumation. Cost includes transportation from the airport (shuttle), to the island (boat), bunk space at the Wrigley Center, and meals.
By purchasing this item, you are buying a seat on an in-person geological field trip.
Please review these Field Safety Documents. You will be contacted to provide your consent to these forms after purchasing a field trip.
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: FT25CN418
Product Category: FTRIP