Ice Age Mammals of the San Pedro River Valley, Southeastern Arizona

What did the San Pedro River valley look like 11,000 years ago? It wasn't the same then as it is today. One difference is that the river had not eroded quite so deeply into its valley as it now has. The climate was cooler and wetter and more water was probably flowing in the river. Fossils prove that plant and animal communities were not the same either. Remains of a number of large animals that are now extinct have been unearthed at several sites along the San Pedro, as well as at other places in Arizona and the Southwest. Points from spears of ancestral humans have been found in association with the fossil remains of some of the animals.Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact azgs-info@email.arizona.edu