[1] It preserves fossils dating back to the Cretaceous period.

The Cintura Formation is divided into 3 stratigraphic members which represent deltaic depositional elements: the basal Marquechi Member, medial San Marcos Member and the uppermost San Juan Member.

[1] The delta is thought to have prograded southward and have an immediate source to its north based on paleocurrents and provenance data.

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