Cambrian Fossils of the Yellowstone National Park is a scientific book written by Charles Doolittle Walcott, an American paleontologist who served as the fourth Secretary of the Smithsonian Institution. The book was first published in 1899 and is considered to be a seminal work in the field of paleontology.The book focuses on the Cambrian fossils found in the Yellowstone National Park, which is located primarily in the US state of Wyoming but also...