A field guide to Newberry Volcano, Oregon

By: , and 



Newberry Volcano is located in central Oregon at the intersection of the Cascade Range and the High Lava Plains. Its lavas range in age from ca. 0.5 Ma to late Holocene. Erupted products range in composition from basalt through rhyolite and cover ~3000 km2. The most recent caldera-forming eruption occurred ~80,000 years ago. This trip will highlight a revised understanding of the volcano's history based on new detailed geologic work. Stops will also focus on evidence for ice and flooding on the volcano, as well as new studies of Holocene mafic eruptions. Newberry is one of the most accessible U.S. volcanoes, and this trip will visit a range of lava types and compositions including tholeiitic and calc-alkaline basalt flows, cinder cones, and rhyolitic domes and tuffs. Stops will include early distal basalts as well as the youngest intracaldera obsidian flow.

Additional publication details

Publication type Book
Title A field guide to Newberry Volcano, Oregon
Volume 15
Year Published 2009
Language English
Publisher Geological Sociey of America
Contributing office(s) Volcano Science Center
Description p. 53-79
Larger Work Type Report
Larger Work Subtype Federal Government Series
Larger Work Title GSA Field Guides
First page 53
Last page 79
Country United States
State Oregon