The Geologic Story of Arches National Park / Geological Survey Bulletin 1393

by Stanley William Lohman

BALANCED ROCK, guarding The Windows section of Arches National Park. Rock is Slick Rock Member of Entrada Sandstone resting upon crinkly bedded Dewey Bridge Member of the Entrada. White rock in foreground is Navajo Sandstone. La Sal Mountains on right skyline. (Frontispiece)

The Geologic Story of
Arches
NATIONAL PARK

By S. W. Lohman
Graphics by
John R. Stacy

GEOLOGICAL SURVEY BULLETIN 1393

UNITED STATES DEPARTMENT OF THE INTERIOR
ROGERS C. B. MORTON, Secretary

GEOLOGICAL SURVEY
V. E. McKelvey, Director

U.S. GOVERNMENT PRINTING OFFICE: 1975

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Library of Congress Cataloging in Publication Data Lohman, Stanley William, 1907- The geologic story of Arches National Park. (Geological Survey Bulletin 1393) Bibliography: p. Includes index. Supt. of Docs. no.: I 19.3:1393 1. Geology—Utah—Arches National Park—Guide-books. 2. Arches National Park, Utah—Guide-books. I. Title. II. Series: United States Geological Survey Bulletin 1393. QE75.B9 No. 1393 [QE170.A7] 557.3′08s [557.92′58] 74-23324

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For sale by the Superintendent of Documents, U. S. Government Printing Office
Washington, D. C. 20402
Stock Number 024-001-02598-1