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Surface tar-sand deposits in California | 1987 | surface tar-sand deposits; tar sand; surface tar sand; California; oil seeps; stratigraphy; tar sand deposit structure | Tar sand deposits and oil seeps have been known in California for more than a century and were used in the exploration for many of California's largest oil fields. Sixty deposits visited by this writer yielded 24 deposits totaling 5.27 billion barrels of oil in place and another 36 estimated at 1-2 ... |
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