| Abstract: | The Cedars ultramafic mass is a mantle fragment that consists of partially serpentinized spinel harzburgite and dunite. Compositional layering and a chromite lineation define a penetrative metamorphic foliation that almost certainly formed in the upper mantle. Although detailed petrofabric and mineral chemistry are presently lacking, it seems reasonable that the Cedars peridotite represents a slice of mantle tectonite that once formed the base of the Coast Range ophiolite, and not an abyssal peridotite tectonically emplaced within the Franciscan accretionary prism. |
| Genre: | USGS Numbered Series |
| ProdID: | 70039464 |
| Citation Author: | Blake, M. Clark, Jr.; Bailey, Edgar H.; Wentworth, Carl M. |
| Citation Contributing Office: | Geology, Minerals, Energy, and Geophysics Science Center |
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| Citation End Page: | 13 |
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| Citation Language: | English |
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| Citation No Pagination: | |
| Citation Number Of Pages: | 16 |
| Citation Online Only Flag: | Y |
| Citation Phsyical Description: | iii, 13 p.; maps col.; Plate: 1 Sheet: 15 x 15 inches |
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| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 2012-1164 |
| Citation Search Results Text: | The Cedars ultramafic mass, Sonoma County, California; 2012; OFR; 2012-1164; Blake, M. Clark, Jr.; Bailey, Edgar H.; Wentworth, Carl M. |
| Citation Start Page: | i |
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| Citation Year: | 2012 |
| Type: | citation/reference |
| Text: | The Cedars ultramafic mass, Sonoma County, California; 2012; OFR; 2012-1164; Blake, M. Clark, Jr.; Bailey, Edgar H.; Wentworth, Carl M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/ofr_2012_1164.gif |
| URL (INDEX PAGE): | http://pubs.usgs.gov/of/2012/1164/ |
| URL (DOCUMENT): | http://pubs.usgs.gov/of/2012/1164/of2012-1164_text.pdf |
| Date Other: | Tue, 7 Aug 2012 00:00 -0500 |
| Publisher: | U.S. Geological Survey |
