Arc Versus River—The Geology of the Columbia River Gorge
The Columbia River Gorge is the Columbia River’s long-held yet evolving passage through the volcanic arc of the Cascade Range. The globally unique setting of a continental-scale river bisecting an active volcanic arc at the leading edge of a major plate boundary creates a remarkable setting where dynamic volcanic and tectonic processes interact with diverse and energetic fluvial processes. This three-day field trip explores several elements of the gorge and its remarkable geologic history—cast here as a contest between regional tectonic and volcanic processes building and displacing landscapes, and the relentless power of the Columbia River striving to maintain a smooth passage to the sea.
© 2021 The Geological Society of America.
O'Connor, Jim E.; Wells, Ray E.; Bennett, Scott E.K.; Cannon, Charles M.; Staich, Lydia M.; Anderson, James L.; Pivarunas, Anthony F.; Gordon, Gabriel W.; Blakely, Richard J.; Stelten, Mark E.; and Evans, Russell C., "Arc Versus River—The Geology of the Columbia River Gorge" (2021). Geology Faculty Publications and Presentations. 231.