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Interior Western United States

GSA Field Guide

Interior Western United States

Author(s)

Geological Society of America

DOI:

https://doi.org/10.1130/0-8137-0006-X

Copyright:

The Geological Society of America

© 2005, The Geological Society of America, Inc. (GSA)., ISBN 978-0-8137-5606-6

ISBN electronic:

9780813756066

ISBN print:

9780813700069

Publication date:

January 01, 2005

The GSA Annual Meeting in Salt Lake City provided a large and diverse terrain for field trips—from the Basin and Range to the Rocky Mountains, from the Snake River Plain, across the Colorado Plateau, to the Mojave Desert. This volume contains 22 field trip articles, nearly all of those run at the 2005 meeting. All combine the latest research with useful road logs to spectacular and often classic geologic settings. The regional tour has a core of structure and stratigraphy-paleontology contributions, and is rounded off with volcanic, glacial, lacustrine, fluvial geomorphology, neotectonic, geologic hazard, and geoarchaeology articles.

Book Chapter

Basaltic volcanism of the central and western Snake River Plain:: A guide to field relations between Twin Falls and Mountain Home, Idaho

Author(s)

John W. Shervais

John W. Shervais

Department of Geology, Utah State University, Logan, Utah 84322–4505, USA

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John D. Kauffman

John D. Kauffman

Idaho Geological Survey, University of Idaho, Moscow, Idaho 83844–3014, USA

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Virginia S. Gillerman

Virginia S. Gillerman

Idaho Geological Survey, Boise State University, Boise, Idaho 83725–1535, USA

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Kurt L. Othberg

Kurt L. Othberg

Idaho Geological Survey, University of Idaho, Moscow, Idaho 83844–3014, USA

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Scott K. Vetter

Scott K. Vetter

Department of Geology, Centenary College, Shreveport, Louisiana 71134, USA

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Ruth Hobson V.

Department of Geology, Utah State University, Logan, Utah 84322–4505, USA

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Meghan Zarnetske

Meghan Zarnetske

Department of Geology, Utah State University, Logan, Utah 84322–4505, USA

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Matthew F. Cooke

Matthew F. Cooke

Department of Geological Sciences, University of South Carolina, Columbia, South Carolina 29208, USA

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Scott H. Matthews

Scott H. Matthews

Department of Geological Sciences, University of South Carolina, Columbia, South Carolina 29208, USA

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Barry B. Hanan

Department of Geological Sciences, San Diego State University, San Diego, California 92182–1020, USA

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Doi:

https://doi.org/10.1130/2005.fld006(02)

Published:

January 01, 2005

Abstract

Basaltic volcanism in the Snake River Plain of southern Idaho has long been associated with the concept of a mantle plume that was overridden by North America during the Neogene and now resides beneath the Yellowstone plateau. This concept is consistent with the time-transgressive nature of rhyolite volcanism in the plain, but the history of basaltic volcanism is more complex. In the eastern Snake River Plain, basalts erupted after the end of major silicic volcanism. The basalts typically erupt from small shield volcanoes that cover up to 680 km² and may form elongate flows that extend 50–60 km...

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