The Pleistocene of North America
 and its vertebrated animals from the states east of the Mississippi River and from the Canadian provinces east of longitude 95°

by Oliver Perry Hay

"The Pleistocene of North America" by Oliver P. Hay is a scientific publication written in the early 20th century. This comprehensive work explores the Pleistocene epoch, focusing specifically on the geology and vertebrate fauna of North America, particularly east of the Mississippi River. It aims to detail the biological and geological transformations that occurred during this significant period in Earth's history, synthesizing findings from fossil records and geographical evidence. At the start of this detailed study, the author introduces his extensive research into the Pleistocene geology and vertebrate life of North America. He discusses the significance of fossil discoveries and emphasizes the necessity of understanding the geological context in which these fossils were found. The opening portion outlines the various stages of the Pleistocene, setting the stage for an in-depth exploration of interglacial periods, glacial cycles, and the overall impact of environmental changes on vertebrate evolution. Hay's meticulous approach reflects the scientific rigor required to explore the complexities of this epoch, indicating a wealth of information and insights to follow throughout the publication.