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GSA Special Papers
Mélanges: Processes of Formation and Societal Significance
Author(s)
John Wakabayashi;
John Wakabayashi
Department of Earth and Environmental Sciences, California State University, Fresno, Fresno, California, USA
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Yildirim Dilek
Yildirim Dilek
Department of Geology, Miami University, Oxford, Ohio, USA
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Geological Society of America

Volume
480
Copyright:
© 2011 Geological Society of America
Attribution: You must attribute the work in the manner specified by the author or licensor (but no in any way that suggests that they endorse you or your use of the work). Noncommercial - you may not use this work for commercial purpose. No Derivative works - You may not alter, transform, or build upon this work. Sharing - Individual scientists are hereby granted permission, without fees or further requests to GSA, to use a single figure, a single table, and/or a brief paragraph of text in other subsequent works and to make unlimited photocopies of items in this journal for noncommercial use in classrooms to further education and science.
ISBN print:
9780813724805
Publication date:
August 01, 2011
Book Chapter
Petrology of a Franciscan olistostrome with a massive sandstone matrix: The King Ridge Road mélange at Cazadero, California
Author(s)
Rolfe Erickson
Emeritus, Geology Department, Sonoma State University, Rohnert Park, California 94928, USA
Rolfe Erickson
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Published:August 01, 2011
The King Ridge Road mélange is a unit of the Franciscan Complex, cropping out in an area of at least 50 km2 around the town of Cazadero, coastal California. This unit is an olistostrome with a massive, unfoliated sandstone matrix, containing >232 large meta-igneous and chert blocks of greatly varying size, lithology, and metamorphic history within the study area. This sandstone matrix is litharenite or arkosic arenite and exhibits prograde prehnite-pumpellyite facies and retrograde zeolite facies metamorphism. It is devoid of megascopic textures except for rare simple bedding. No fossils have been found, and no Bouma units or other...
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Index Terms/Descriptors
- absolute age
- amphibolite facies
- apatite
- arenite
- arkosic composition
- bedding
- California
- Cenozoic
- chain silicates
- clastic rocks
- clinopyroxene
- cooling
- Cretaceous
- dates
- detritus
- exhumation
- facies
- fission-track dating
- Franciscan Complex
- geochronology
- granites
- greenstone
- high-grade metamorphism
- igneous rocks
- island arcs
- Jurassic
- litharenite
- melange
- Mesozoic
- metamorphic rocks
- metamorphism
- mineral assemblages
- nesosilicates
- olistostromes
- omphacite
- orthosilicates
- Paleogene
- petrography
- phosphates
- planar bedding structures
- plutonic rocks
- prehnite-pumpellyite facies
- pyroxene group
- retrograde metamorphism
- sandstone
- schists
- sedimentary rocks
- sedimentary structures
- silicates
- soft sediment deformation
- Sonoma County California
- Tertiary
- United States
- zeolite facies
- zircon
- zircon group
- Cazadero California
- King Ridge Road Melange
- Klamath-Sierra Belt
Latitude & Longitude
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