Full Title: Building San Antonio: Geology, water and building resources in the historic 'Valley of the Missions'
Endorsed by: GSA’s Environmental and Engineering Geology, Geoscience Education, History, Philosophy, and Geoheritage, Geoarchaeology, Quaternary Geology and Geomorphology Divisions
Led by: Thomas Ewing, John Long
Date: Sat. 18 Oct. 2025
Time: 8:30 a.m.-5 p.m.
CEUs: 0.8
The valley of the San Antonio River was the focus for the foundation of five Spanish mission complexes (1718-1731, now a World Heritage Site) and civilian settlement. The valley provided irrigable land, steady water supplies, and varied materials for building. This trip provides an overview of these resources, and how they shaped the early settlement of the 'Valley of the Missions' and the city of San Antonio. We will visit springs, acequias, quarries in limestone and tufa, downtown and mission structures. Results of recent mapping of the San Antonio quadrangle will be included. Cost includes transportation (bus), lunch, snacks, and water.
By purchasing this item, you are buying a seat on an in-person geological field trip.
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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: FT25CN403
Product Category: FTRIP