Through the original writings and photography of renowned geologist Harold Rollin Wanless, this book paints a thorough and engaging picture of the White River Badlands' landscape, geology, biology, pioneer settlers, and how life was lived 100 years ago in a harsh, challenging, remote setting. In the summer of 1920, Harold Rollin Wanless, fresh from an undergraduate geology degree at Princeton, spent the first of three summers in the Badlands of South Dakota camping, hiking, and collecting fossil vertebrate skulls. Harold produced a fascinating and thorough diary and report, illustrated with over 100 image plates, in which he explains the geology, biology, and climate of this famous area. Wanless became deeply involved with and vividly records the life, hopes, trials and character of the new homesteading pioneers of the area, and the people and livelihoods he encountered are reflected in the diary as well. This is an engaging look at the history, environment, people and geological character of a unique portion of the American West. Combining a first-hand look at the White River Badlands and its people a century ago with the fossil history contained in its Cenozoic sediments gives a well-rounded historical presentation. This diary was found, compiled, and edited by Drs. Harold Rogers Wanless (the diarist's son and an accomplished geologist himself) and Emmett Evanoff. In the introductory and concluding chapters of this book, they provide a broader perspective of Harold Rollin Wanless's life and his significant achievements beyond the Badlands venture described here. In addition, this narrative - written "only" a century ago - provides a stark contrast with how we travel, communicate, conduct research and survive today, yet shows that human curiosity and kindnesses have not changed.

The forbidding Big Badlands in Western South Dakota contain the richest fossil beds in the world. Even today these rocks continue to yield new specimens brought to light by snowmelt and rain washing away soft rock deposited on a floodplain long ago. The quality and quantity of the fossils are superb: most of the species to be found there are known from hundreds of specimens. The fossils in the White River Group (and similar deposits in the American west) preserve the entire late Eocene through the middle Oligocene, roughly 35-30 million years ago and more than 30 million years after non-avian dinosaurs became extinct. The fossils provide a detailed record of a period of abrupt global cooling and what happened to creatures who lived through it. The book provides a comprehensive reference to the sediments and fossils of the Big Badlands and will complement, enhance, and in some ways replace the classic 1920 volume by Cleophas C. O'Harra. Because the book focuses on a national treasure, it touches on National Park Service management policies that help protect such significant fossils.