"The Aquitaine basin in southwestern France, just north of the Pyrenees, is a large Mesozoic and Tertiary basin about 200 miles across.... The strata of greatest importance as containers of oil are the Jurassic and upper Cretaceous. Of these two the Jurassic seems most promising. One area of structures near the Pyrenees has already been proved to have commercial quantities of gas and is being actively developed."

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