Geological Survey (U.S.)

Keith E. Bargar

Terry E. C. Keith

Melvin H. Beeson

A study of late Tertiary hydrothermal alteration corresponding to zeolite-facies to greenschist-facies metamorphism and Quaternary hydrothermal and fumarolic minerals from outcrops and geothermal drill holes near Mount Hood, Oregon.

Hydrothermal Alteration in the Mount Hood Area, Oregon

David A. Seeland

Evelyn B. Newman

Joseph Haffty

Robert George Schmidt

Arthur R. Paradis

Leonard Benjamin Riley

Earl E. Brabb

W. D. Goss

A Descriptive Report on an Area in the Disturbed Belt Along the Eastern Front of the Northern Rocky Mountains in Western Montana

Rocks and Mineral Resources of the Wolf Creek Area, Lewis and Clark and Cascade Counties, Montana

Keith E. Bargar

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