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Oil, Gas & Geothermal - History & Trivia 

Natural Oil and Gas Seeps
Asphaltum mound in the Silverthread Area, Ojai oil field, Ventura County, CA. Photo by S. Mulqueen. 

Asphaltum mound in the Silverthread Area, Ojai oil field, Ventura County, CA. Photo by S. Mulqueen.

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Petroleum seep with oil and gas rising to the surface. The seep began after the 1994 Northridge earthquake in the North Sulphur Mountain Area of Ojai oil field, Ventura County, CA. Photo by S. Mulqueen. Flowering plant at an oil seep in the Silverthread Area of Ojai oil field, Ventura County, CA. Photo by S. Mulqueen. Flowering plants grow around petroleum seeps due to the continuous water supply provided by the seep. Silverthread Area, Ojai oil field, Ventura County, CA. Photo by S. Mulqueen. Asphaltum mound in the Silverthread Area, Ojai oil field, Ventura County, CA. Photo by S. Mulqueen. Group of entomologists researching the habitat of the petroleum fly and other insects at a petroleum seep, Silverthread Area, Ojai oil field, Ventura County, CA. Photo by S. Mulqueen.


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