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GEOREF RECORD

Geology of the Elkhorn Mountains, northeastern Oregon; Bald Mountain Batholith

William Harris Taubeneck
Geology of the Elkhorn Mountains, northeastern Oregon; Bald Mountain Batholith
Bulletin of the Geological Society of America (February 1957) 68 (2): 181-238

Abstract

The Bald Mountain batholith in the Elkhorn Mountains of northeastern Oregon has intrusive relations to a heterogeneous assortment of Permian sediments and a Triassic metagabbro-serpentine sequence. The batholith is a composite intrusive composed of at least eight distinct rock types which range from norite to quartz monzonite. The different units were emplaced in a mafic to felsic sequence that commenced with norite, continued with tonalite and granodiorite, then leucogranodiorites, and ended with the emplacement of leucocratic quartz monzonite. The tonalite and granodiorite are gradational facies of the major intrusion and represent about 97 per cent of the 171 square miles of exposed batholithic rocks.


ISSN: 1050-9747
Coden: BUGMAF
Serial Title: Bulletin of the Geological Society of America
Serial Volume: 68
Serial Issue: 2
Title: Geology of the Elkhorn Mountains, northeastern Oregon; Bald Mountain Batholith
Pages: 181-238
Published: 195702
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
Accession Number: 1959-030343
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. map
N42°00'00" - N46°19'60", W124°34'60" - W116°34'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1959
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