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The Taraises Formation (Berriasian-Valanginian) in Northeastern Mexico: Subsurface and Outcrop Studies

By
Abelardo Cantú-Chapa
Abelardo Cantú-Chapa
Instituto Politécnico Nacional, Mexico City, Mexico
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Published:
January 01, 2001

Abstract

The Berriasian-Valanginian Taraises Formation in the subsurface of northeastern Mexico consists of an intercalation of argillaceous limestone and shale. This formation is divided into two members, based on lithologic characteristics defined from electric and radioactivity logs from oil wells in northeastern Mexico. In addition, two small ammonite groups of the subfamily Olcostephaninae (upper Valanginian) collected at Potrero de García, Nuevo León, northeastern Mexico, are described: (1) Capeloites neoleonense n. sp. and (2) Garcites potrerensis n. gen. and sp. and G. cavernensis n. gen. and sp. The presence of Dichotomites (Dichotomites) sp. in the same beds supports an late Valanginian age for these strata. One specimen of Capeloites obtained from a core of the La Laja-8 well, south of Tampico City, eastern Mexico, designates an late Valanginian age for the interval drilled (2556-2562 m) in the so-called Lower Tamaulipas Formation in this area. Global geographic distribution of Capeloites is restricted to France, Spain, and Peru; its presence in Mexico supports a biogeographic link between Europe and America.

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Contents

Memoir - AAPG

The Western Gulf of Mexico Basin: Tectonics,Sedimentary Basins, and Petroleum Systems

Claudio Bartolini
Claudio Bartolini
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Richard T. Buffler
Richard T. Buffler
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Abelardo Cantú-Chapa
Abelardo Cantú-Chapa
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American Association of Petroleum Geologists
Volume
75
ISBN electronic:
9781629810638
Publication date:
January 01, 2001

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