Metamorphic facies indicated by vein minerals in basal beds of the Great Valley sequence, northern California
Journal of Research of the U.S. Geological Survey
By: Edgar H. Bailey and David L. Jones
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Abstract
A reexamination of reported blueschist mineral localities in the basal strata of the Great Valley sequence revealed only prehnite-pumpellyite facies minerals. Franciscan graywacke thrust below the Great Valley rocks contains lawsonite-quartz blueschist assemblages. At a common pressure of about 4 kb, the Franciscan blueschists formed at lower temperatures than the overlying Great Valley prehnite-bearing rocks, lending support to tectonic models that involve rapid subduction of the Franciscan rocks.
Suggested Citation
Bailey, E., and Jones, D.L., 1973, Metamorphic facies indicated by vein minerals in basal beds of the Great Valley sequence, northern California: Journal of Research of the U.S. Geological Survey, v. 1, no. 4, p. 383-385.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Metamorphic facies indicated by vein minerals in basal beds of the Great Valley sequence, northern California |
| Series title | Journal of Research of the U.S. Geological Survey |
| Volume | 1 |
| Issue | 4 |
| Year Published | 1973 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 3 p. |
| First page | 383 |
| Last page | 385 |
| Country | United States of America |
| State | California |
| Other Geospatial | Great Valley Sequence |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |