James Lawrence Powell

To My Children: Maria, Dirk, and Joanna And to Gene Shoemaker: The Pathfinder

Cover illustration and design: Roy Wiemann Text design: Diana Blume

Cover photos: Top, Mamenchisaurus, detail from "Crossing the Flats" © 1986 by Mark Hallett, Salem, Oregon; bottom left, dinosaur footprints, New York Public Library Picture Collection; bottom right, the Cretaceous/Tertiary boundary interval, Raton Basin, Colorado and New Mexico, photo by Glenn Izett.

Library of Congress Cataloging-in-Publication Data

Powell, James Lawrence, 1936-

Night comes to the Cretaceous : dinosaur extinction and the transformation of modern geology / James L. Powell p. cm.

Includes bibliographical references and index. ISBN 0-7167-3117-7

1. Catastrophes (Geology) 2. Extinction (Biology) 3. Dinosaurs. 4. Title.

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