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Schematic regional cross section through the Ayoluengo oil field. The deep erosion by rivers in nearby areas allows observe on outcrops most of the elements of the Ayoluengo petroleum system. It allows observing tar impregnated sands in the core of a spectacular surface anticline. Also are observed outcrops of the black shales of Liassic age which have been largely considered as the only source rock for the Ayoluengo oil.
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Schematic regional cross section through the Ayoluengo oil field. The deep erosion by rivers in nearby areas allows observe on outcrops most of the elements of the Ayoluengo petroleum system. It allows observing tar impregnated sands in the core of a spectacular surface anticline. Also are observed outcrops of the black shales of Liassic age which have been largely considered as the only source rock for the Ayoluengo oil.