| Contents |
Foreword / Adam M. Booth and Anita L. Grunder -- 1. Developing landslide chronologies using landslide-damned lakes in the Oregon Coast Range / Logan R. Wetherell, William T. Struble, and Sean R. LaHusen -- 2. Deep-water deposits of the Eocene Tyee Formation, Oregon / Gwladys T. Gaillot, Michael L. Sweet, and Manasij Santra -- 3. The Mount Hoot fault zone, active faulting at the crest of the dynamic Cascade Range, north-central Oregon, USA / Ian P. Madin, Ashley R. Streig, and Scott E.K. Bennett -- 4. Middle Jurassic to Early Cretaceous tectonic evoluton of the western Klamath Mountains and outboard Franciscan assemblages, northern California-southern Oregon, USA / Alan D. Chapman, Doug Yule, William Schmidt, and Todd LaMaskin -- 5. Arc versus river -- the geology of the Columbia River Gorge / Jim E. O'Connor, Ray E. Wells, Scott E.K. Bennett, Charles M. Cannon, Lydia M. Staisch, James L. Anderson, Anthony F. Pivarunas, Gabriel W. Gordon, Richard J. Blakely, Mark E. Stelten, and Russell C. Evarts -- 6. Tectonics and paleography of a post-accretionary forearc basin, Coos Bay area, SW Oregon, USA / John M. Armentrout -- 7. Upper Grand Coulee : new views of a channeled scabland megafloods enigma / Richard B. Waitt, Brian F. Atwater, Karin Lehnigk, Isaac J. Larsen, Bruce N. Bjornstad, Michelle A. Hanson, and Jim E. O'Connor -- 8. Flood basalts, rhyolites, and subsequent volcanism of the Columbia River magmatic province in eastern Oregon, USA / Emily B. Cahoon, Martin J. Streck, and Mark Ferns. |
| Abstract |
The eight field trips in this volume, associated with GSA Connects 2021 held in Portland, Oregon, USA, reflect the rich and varied geological legacy of the Pacific Northwest. The western margin of North America has had a complex subduction and transform history throughout the Phanerozoic, building a collage of terranes. The terrain has been modified by Cenozoic sedimentation, magmatism, and faulting related to Cascadia subduction, passage of the Yellowstone hot spot, and north and westward propagation of the Basin and Range province. The youngest flood basalt province on Earth also inundated the landscape, while the mighty Columbia watershed kept pace with arc construction and funneled epic ice-age floods from the craton to the coast. Additional erosive processes such as landslides continue to shape this dynamic geological wonderland. |
