The magmatic origin of the Columbia River Gorge, USA

Science Advances
By: , and 



Along subduction zones, high-relief topography is associated with sustained volcanism parallel to the plate margin. However, the relationship between magmatism and mountain building in arcs is poorly understood. Here, we study patterns of surface deformation and correlated fluvial knickpoints in the Columbia River Gorge to link long-term magmatism to the uplift and ensuing topographic development of the Cascade Range. An upwarped paleochannel exposed in the walls of the Gorge constrains unsteady deep magma flux, the ratio of intrusive to extrusive magmatic contributions to topography, and the impact of magmatism on Columbia River incision since 3.5 million years ago. Geophysical data indicate that deep magma influx beneath the arc axis is ongoing and not aligned with the current locations of volcanic edifices, representing a broad regional influence on arc construction.

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Publication type Article
Publication Subtype Journal Article
Title The magmatic origin of the Columbia River Gorge, USA
Series title Science Advances
DOI 10.1126/sciadv.adj3357
Volume 9
Issue 51
Year Published 2024
Language English
Publisher American Association for the Advancement of Science
Contributing office(s) Geology, Minerals, Energy, and Geophysics Science Center
Description eadj3357, 9 p.
Country United States
State Oregon, Washington
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