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...sup>3</sup>) of gas from upper Miocene, deep-water sandstones known as the Stevens ([[:file:Mth14ch02f01.jpg|Figure 1]]). ...ls derive from Monterey Shale source rocks, Yowlumne is part of a Monterey-Stevens petroleum system (Graham and Williams).<ref name=Grahamandwilliams_1985>Gra

...cies]] of [[benthic]] foraminiferal species in the upper Miocene [[Stevens Sandstone]] of the southern [[San Joaquin Valley]]. He demonstrates that the biofacie