BOLETÍN DE LA SOCIEDAD GEOLÓGICA MEXICANA VOL. 59, NÚM:. 1, 2007, p. 115-123 http://dx.doi.org/10.18268/BSGM2007v59n1a9

Eocene strata from the Sabinas Basin and their bearing in sedimentary basin correlation in NE Mexico

Francisco J. Vega¹, María del Carmen Perrilliat¹, Luis Duarte-Torres², Gerardo Durán-Herrera², Roberto Rivas-García², Marcelo Aguilar-Piña³, José F. Ventura⁴

¹ Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, México, DF 04510, Mexico.
² Minerales Monclova S.A.de C.V., Prolongación Presidente Cárdenas S/N, 26350 Palaú, Coahuila, Mexico.
³ Instituto Mexicano del Petróleo, Exploración (Geociencias), Eje Central Norte Lázaro Cárdenas 152, Col. San Bartolo Atepehuacan, A. P. 14-805,. México, D.F. 07730, Mexico.
⁴ Santa Engracía #257, Fraccionamiento Santa Elena, Saltillo, Coahuila, Mexico.

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Abstract

The El Arco section, located on the southeast margin of the Sabinas Basin (Adjuntas Sub-basin), includes a succession consisting of Upper Cretaceous formations typical for this unit, as well as Paleogene strata similar to those previously reported from the La Popa Basin, adjacent to the Sabinas Basin. The El Arco carbonate lentil includes microfossils and nautiloids that indicate a middle Eocene age, which is consistent with previous stratigraphic inferences for the La Popa Basin. The presence of the nautiloid Hercoglossa sp. cf. H. peruviana in the El Arco Lentil and in the upper portion of the Rancho Nuevo Formation of Parras Basin, suggests a new correlation scheme for the Tertiary stratigraphic units of the three basins (Parras, La Popa and Sabinas basins). All three units had sediment input as late as middle Eocene time.

Keywords: Middle Eocene, Sabinas Basin, basin correlation, Northeastern Mexico.