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Abstract

AAPG Memoir 75, Chapter 13: The Nazas Formation of Northern Mexico: a Detailed Look at the Pacific Convergent Margin Forming the Western Rim of the Gulf of Mexico Province, by Jon F. Blickwede, Pages 317 - 342
from:
AAPG Memoir 75: The Western Gulf of Mexico Basin: Tectonics, Sedimentary Basins, and Petroleum Systems, Edited by Claudio Bartolini, Richard T. Buffler, and Abelardo Cant250_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 Mexico: a Detailed Look at the Pacific Convergent Margin Forming the Western Rim of the Gulf of Mexico 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, Mexico, 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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