Principal Unconformities in Triassicr-R* • Andj Jurassict ' Rocks,YY 1 Western Interior United States— a Preliminary Survey
Principal Unconformities in Triassicr-r* • andJ JurassicT ' Rocks,YY 1 Western Interior United States— A Preliminary Survey GEOLOGICAL SURVEY PROFESSIONAL PAPER 1035-A Principal Unconformities in Triassic and Jurassic Rocks, Western Interior United States A Preliminary Survey By G. N. PIPIRINGOS and R. B. O'SULLIVAN UNCONFORMITIES, CORRELATION, AND NOMENCLATURE OF SOME TRIASSIC AND JURASSIC ROCKS, WESTERN INTERIOR UNITED STATES GEOLOGICAL SURVEY PROFESSIONAL PAPER 1035-A Description of nine widespread unconformities in Triassic and Jurassic rocks UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1978 UNITED STATES DEPARTMENT OF THE INTERIOR CECIL D. ANDRUS, Secretary GEOLOGICAL SURVEY H. William Menard, Director Library of Congress Cataloging in Publication Data Pipiringos, George Nicholas, 1918 Principal unconformities in Triassic and Jurassic rocks, Western Interior United States. (Unconformities, correlation, and nomenclature of some Triassic and Jurassic rocks, Western Interior United States) (Geological Survey Professional Paper 1035-A) Bibliography: p. 26 1. Geology, Stratigraphic— Triassic. 2. Geology, Stratigraphic- Jurassic. 3. Stratigraphic correlation-The West. 4. Geology-The West. I. O'Sullivan, Robert Brett, 1923-joint author. II. Title. III. Series. IV. Series: United States Geological Survey Professional Paper 103S-A QE676.PS6 SS1.7'6'0978 77-608355 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 Stock Number 024-001-03125-6 CONTENTS Page Page Abstract ............................................................................................
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