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The Cloudy Pass epizonal batholith and associated subvolcanic rocks

Fred W. Cater
The Cloudy Pass epizonal batholith and associated subvolcanic rocks
Special Paper - Geological Society of America (1969): 54 pp.

Abstract

The Cloudy Pass batholith, consisting largely of labradorite granodiorite, discordantly intrudes pre-Late Cretaceous rocks in north-central Washington. The small batholith is remarkable for its chilled borders, associated porphyry plugs, and intrusive breccias. It is bordered on the northeast by the 1.5-mi-thick chilled complex of Hart Lake that consists of separately injected, contrasting layers of dacite and labradorite-bytownite andesite porphyries and autobreccias. Porphyry plugs, largely dacite, puncture the adjacent metamorphic rocks. Intrusive breccias are of two types, one confined to the core of the batholith, the other, apparently injected explosively, confined to the porphyry plugs and gneiss. Plagioclases range from high- to low-temperature; the low-temperature form, in the batholith core and in the complex, is thought to have inverted from original high-temperature.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Title: The Cloudy Pass epizonal batholith and associated subvolcanic rocks
Author(s): Cater, Fred W.
Published: 1969
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
ISBN: 978-0-81372-116-3
Number of pages: 54
Accession Number: 1969-032534
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Monographic
Illustration Description: illus., tables, geol. map
N45°30'00" - N49°00'00", W124°45'00" - W116°55'00"
Source Note: 116
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1969
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