Blueschist metamorphism in the Yreka-Fort Jones area, Klamath Mountains, California

Journal of Research of the U.S. Geological Survey
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Abstract

Blueschist is plentiful in the Yreka-Fort Jones area, eastern Klamath Mountains, adjacent to a belt of serpentinite that marks the boundary between two fundamental lithologic units, an eastern belt of early Paleozoic sedimentary and metamorphic rocks, and a western greenstone-chert assemblage of late Paleozoic and Triassic(?) age. The blueschists, which contain lawsonite and glaucophane or crossite, occur with phyllitic quartzite and siliceous phyllite of the Stuart Fork Formation, which is overthrust northwestward on the greenstone-chert terrane. The blueschist facies metamorphism probably was synchronous with Middle and Late Jurassic metamorphism of the Stuart Fork Formation. The blueschist-serpentinite terrane possibly marks the site of collision between the eastern Klamath plate and an oceanic western Paleozoic and Triassic plate.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Blueschist metamorphism in the Yreka-Fort Jones area, Klamath Mountains, California
Series title Journal of Research of the U.S. Geological Survey
Volume 1
Issue 1
Year Published 1973
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description 9 p.
First page 53
Last page 61
Country United States of America
State California
Other Geospatial Klamath Mountains
Online Only (Y/N) N
Additional Online Files (Y/N) N
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