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Occurrence of Oil in Metamorphic Rocks of San Gabriel Mountains, Los Angeles County, California

ABSTRACT.

An occurrence of nearly water-white light-gravity oil obtained from wells drilled on the north side of the San Gabriel Mountains [in Placerita Canyon], Los Angeles County, California, has been of interest to geologists for many years. The metamorphic rocks are in fault contact with sedimentary rocks, those at the surface being of late Pliocene and Pleistocene age. From a detailed study of the geology of this region the conclusion is reached that the oil has migrated in Eocene strata underlying the Pliocene and migrated along faults to its present position in the crystalline rocks. Filtration taking place during this migration is thought to have been competent to produce this light oil having a high percentage of aromatic hydrocarbons.

PLACERITA WHITE OIL

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Geologic Report 1974

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Locator Map: New Century-1 (Oil Seep)

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Topo Map: Oil Seep

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White Oil Gusher, 1900

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White Oil Gusher, 1900

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New Century Oil Co. Ad 1900

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Pan-American Exposition 1901

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Wells & Rails 1911

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Walker's Separator

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Herman Mosher's New Century Well

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Mosher's New Century Boiler

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White Oil Analysis 1900

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Brown & Kew 1932

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Oil Seep

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Alterations 2013

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New Footbridge & Signage 12/2013 x2

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