“This book should be in the travel bag of anyone interested in exploring this remarkable stage in the heart of North America.”—Michael Forsberg, photographer and author of Great Plains: America’s Lingering Wild

“Great Plains Geology is a book I wish I’d had fifty years ago when we moved to Nebraska and started commuting to Oklahoma to visit relatives. [Diffendal’s] narrative enriches the Great Plains experience immeasurably, especially for those who’ve made their homes here.”—John Janovy Jr., Varner Professor Emeritus at the University of Nebraska–Lincoln and author of Keith County Journal 

“This is an indispensable travel guide for anyone wishing to explore and appreciate the mysteries of this beautiful landscape.”—Dale A. Winkler, research professor of paleontology at Southern Methodist University

“Until now, eco-tourists visiting the Great Plains faced a void of geological information. . . . [Great Plains Geology] is clearly and succinctly written by a leading geologist in a way that nongeologists will understand and appreciate.”—James Stubbendieck, director emeritus of the Center for Great Plains Studies at the University of Nebraska–Lincoln and author of North American Wildland Plants

“Professor Diffendal has done a marvelous job of assembling information and images about the rich geological history and terrain of the Great Plains. For those who have ever lived in or spent time in the region, as I have, or been as smitten with geology as I was. . . . I highly recommend it.”—Robert Wuthnow, professor of sociology at Princeton University and author of Remaking the Heartland: Middle America since the 1950s

“An enjoyable guide to the best geological sites in the Great Plains of Canada and the United States. Professor Diffendal’s lively writing unites geology with personal and historical references to provide a great resource for those traveling and sightseeing.”—David Watkins, professor of earth and atmospheric sciences at the University of Nebraska–Lincoln

“From the inquisitive tourist or landowner, to the ‘wannabe’ archaeologist or dinosaur hunter, to the professional scientist or historian who seeks information in a related field, this book is a must-read. . . . [It] will quickly dispel the idea that the Great Plains are a monotonous and continuously flat region.”—Gerald Schultz, professor of geology at West Texas A&M University