Late Cretaceous and Cenozoic Mammals of North America: Biostratigraphy and Geochronology. Michael O. Woodburne, ed. 2004. Columbia University Press, New York, 391 + xv p. $95.00. ISBN 0-231-13040-6.

Fossil mammals were first collected by trappers, soldiers, and natural history surveys from the American West in the mid-nineteenth century. These initial discoveries led to subsequent fossil collecting expeditions by many prominent North American vertebrate paleontologists of the day (Lanhan, 1973). As a result of these discoveries, for the past 150 years paleontologists working in continental deposits of North America have used the extensive sequence of fossil mammals, particularly from...

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