Blueschist metamorphism in the Yreka-Fort Jones area, Klamath Mountains, California
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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.
Study Area
| 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 |
| Google Analytic Metrics | Metrics page |