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AAPG Special Volumes

Abstract

C. Bartolini, R. T. Buffler, and J. Blickwede, 2003, The Circum-Gulf of Mexico and the Caribbean: Hydrocarbon habitats, basin formation, and plate tectonics: AAPG Memoir 79, p. 419-426.

Copyright copy2003. The American Association of Petroleum Geologists. All rights reserved.

Lower Eocene Large Ostreids from the Viento Formation; Stratigraphic and Paleoecologic Implications for the La Popa Basin, Nuevo Leoacute1_boldn, Mexico

Mariacutea del Carmen Perrilliat, Francisco J. Vega

Instituto de Geologiacutea, Universidad Nacional Autoacutenoma de Meacutexico, Mexico City

ACKNOWLEDGMENTS

The authors would like to express their gratitude to the Consejo Nacional de Ciencia y Tecnologiacutea for the support provided to this research from the project CONACYT–NSF Otontildeo 2000, ldquopaleobiogeografia y evolucioacuten de crustaacuteceos y moluscos del Eoceno–Oligoceno de Meacutexicordquo.

ABSTRACT

Three species of lower Eocene ostreids are reported from the Viento Formation of the La Popa Basin, Nuevo Leoacuten, northeastern Mexico. Two of them are described as new: Ostrea (Turkostrea) ventosa new species, and Ostrea (Turkostrea) ovata new species. Ostrea sp. is also reported associated with the new forms. The large size of these species, in contrast with their small relatives from equivalent depositional environments in the underlying Adjuntas Formation, suggests that paleoclimate played an important role in their size development. These ostreids are the youngest fossils reported from the La Popa Basin, as the Viento Formation has remained undated prior to this contribution. The age suggested for the Viento Formation corresponds to the early Eocene, probably the upper part of the Ypresian.

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