The Pleistocene was the age of megafauna in Arizona's San Pedro River Valley. This article by Everett Lindsay documents the range of organisms one might have encountered. http://www.azgs.az.gov/arizona_geology/archived_issues/Winter_1984.pdf
Photographer: Rudolph F. Zallinger
Photo Date: 1984
Photo Location Accuracy: Approximately Located
Photo Tags: San Pedro River Valley, Pleistocene, megafauna, geotourism 
