Geological Survey Professional Paper 669 The Colorado River Region and John Wesley Powell

Cover

Foreword

(A) John Wesley Powell: Pioneer statesman of Federal science, by Mary C. Rabbitt

(B) Stratified rocks of the Grand Canyon, by Edwin D. McKee

(C) Geologic history of the Colorado River, by Charles B. Hunt

(D) The rapids and the pools—Grand Canyon, by Luna B. Leopold

Major John Wesley Powell (1834-1902) (Photograph courtesy of Smithsonian Institution)

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UNITED STATES DEPARTMENT OF THE INTERIOR
WALTER J. HICKEL, Secretary

GEOLOGICAL SURVEY
William T. Pecora, Director

Library of Congress catalog-card No. 77-650223

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