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Abstract

AAPG Memoir 75, Chapter 13: The Nazas Formation of Northern Previous HitMexicoNext Hit: a Detailed Look at the Pacific Convergent Margin Forming the Western Rim of the Previous HitGulfNext Hit of Previous HitMexicoNext Hit Province, by Jon F. Blickwede, Pages 317 - 342
from:
AAPG Memoir 75: The Western Previous HitGulfNext Hit of Previous HitMexicoNext Hit Basin: Tectonics, Sedimentary Basins, and Petroleum Systems, Edited by Claudio Bartolini, Richard T. Buffler, and Abelardo Cant
250_u.jpg (467 bytes)-Chapa
Copyright copyrght.jpg (4253 bytes)2001 by The American Association of Petroleum Geologists. All rights reserved.

The Nazas Formation of Northern Previous HitMexicoNext Hit: a Detailed Look at the Pacific Convergent Margin Forming the Western Rim of the Previous HitGulfNext Hit of Previous HitMexicoNext Hit Province

Jon F. Blickwede
IHS Energy Group, Houston, Texas, U.S.A.


DEDICATION

I dedicate this paper to the family of Don Domingo Ju225_a.jpg (470 bytes)rez of Caopas, Zacatecas, as well as to the memory of Manuel L243_o.jpg (458 bytes)pez Infanz243_o.jpg (458 bytes)n, geologist of the Instituto Mexicano del Petr243_o.jpg (458 bytes)leo.

ABSTRACT

The lower Mesozoic Nazas Formation, where it crops out in the Sierra de San Juli225_a.jpg (470 bytes)n in northern Zacatecas state, Previous HitMexicoTop, consists of slightly metamorphosed volcanic rocks and unfossiliferous continental red beds measuring a combined total thickness of approximately 1 km. The age of the Nazas remains equivocal, although limited radiometric dates from the Nazas and adjacent units indicate that the formation is probably Triassic and/or Early to Middle Jurassic in age.

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