The oil-containing, schist-bearing clastics, on the schist and below the nodular shale of the Venice and Del Rey oil fields, are determined as of Upper Miocene age by fossil mollusks found in cores. Emergence of the area in Vaqueros through Temblor into Upper Miocene time, and conformity between the schist sand and nodular shale, are indicated. They are correlated with Hoots’ “basal Modelo graywacke” of Santa Monica Mountains.

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