Bulletin . pparentlyat random in loose surface materials; fifth, the wells drilled along thisseepage line show no correspondence whatever in their logs, and appearto be drilled in broken material; sixth, the oil from these seepages is of ahighly uniform quality, a heavy, thick tar; seventh, the wells whichhave produced oil have found, in almost all cases, the same quality asthat coming from the surface seeps, even when found at great depth;and last, none of the wells outside of the Summerland group have foundany oil whatever in sand, but always in tarry streaks or masses inter-spersed in shale
Bulletin . pparentlyat random in loose surface materials; fifth, the wells drilled along thisseepage line show no correspondence whatever in their logs, and appearto be drilled in broken material; sixth, the oil from these seepages is of ahighly uniform quality, a heavy, thick tar; seventh, the wells whichhave produced oil have found, in almost all cases, the same quality asthat coming from the surface seeps, even when found at great depth;and last, none of the wells outside of the Summerland group have foundany oil whatever in sand, but always in tarry streaks or masses inter-spersed in shale beds. The range and extent of these seepages are sufficient evidence thata very considerable quantity of petroleum either now exists or has formerly existed along this has always gone onthe assumption that the presentsource of this material is an oil-bearing sand, and that the seep-ages are from outcrops lightlycovered with alluvium. The twopossibilities under this view areindicated Figure 30. J SANTA BARBAEA COAST. 405
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