Cordilleran Volcanism, Plutonism, and Magma Generation at Various Crustal Levels, Montana and Idaho
Donald Hyndman, editor 1989 American Geophysical Union Field Trip Guidebook T337

This six-day field trip examines emplacement of late Cretaceous to Eocene felsic magmas at various depths in the crust, from deep continental crust to the earth's surface. The trip is in three parts, each approximately two days long. (1) Idaho baholith: deep plutonic, with no preserved volcanic rocks that are known to be related. (2) Boulder batholith and Elkhorn Mountains Volcanics: shallow plutons, with some preserved volcanic rocks erupted from them. (3) Challis Volcanics: broad volcanic field erupted from calderas, with some exposure of magma-chamber plutons.

ISBN 0-87590-597-8
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This resource is referenced here:

• Integrating Research and Education:Montana Geoheritage Project:Montana-Yellowstone Geologic Field Guide Database:MT Field Guides: Volcanism and Plutonism at Shallow Crustal Levels: The Elkhorn Mountains Volcanics and the Boulder batholith, southwestern Montana
• Integrating Research and Education:Montana Geoheritage Project:Montana-Yellowstone Geologic Field Guide Database:MT Field Guides: Plutonism at Deep Crustal Levels: The Idaho Batholith, Montana and Idaho

Subject: Geoscience:Geology:Igneous and Metamorphic Petrology:Igneous Processes, Geochemistry, Igneous Associations and Tectonic Settings, Education, Geoscience:Geology:Tectonics, Igneous and Metamorphic Petrology:Volcanology, Igneous Rocks
Resource Type: Pedagogic Resources:Research Results, Activities:Field Activity:Field trip , Scientific Resources:Research Results, Overview/Reference Work, Audio/Visual:Maps, Journal Article
Special Interest: Field-Based Teaching and Learning
Grade Level: Graduate/Professional