Santa Margarita Formation
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The Santa Margarita Formation is a Neogene Period geologic formation in the San Joaquin Valley of central California.
Fossil from the Santa Margarita Formation
Russell Ranch Oil Field
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The Russell Ranch Oil Field is an oil and gas field in the Cuyama Valley of northern Santa Barbara and southern San Luis Obispo Counties, California, in the United States. Discovered in 1948, and reac
The Russell Ranch Oil Field in central and southern California. Other oil fields are shown in dark gray.
Cluster of active oil wells in the Russell Ranch field, south of SR 166.