Late Cretaceous Anoxia and Lateral Microfacies Changes in the Tres Esquinas Member, La Luna Formation, Western Venezuela.

Parra, M.; Moscardelli, L. and Lorente, M. A. 2003


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The Tres Esquinas Member represents a significant event at the end of the La Luna Formation sedimentary cycle in the Maracaibo Basin. Abundant benthic foraminifera, trace fossils, low organic-carbon contents, and the occurrence of phosphate and glauconite indicate higher oxygen levels than during deposition of the underlying La Luna Formation.

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