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-Yellowstone Geologic Field Guide Database:MT Field Guides: Plutonism at Deep Crustal Levels: The Idaho Batholith, Montana and Idaho
• Integrating Research and Education: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

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