Land Mammals of the Irvingtonian Age

Land Mammals of the Irvingtonian Age. . Tens of thousands of fossils, were excavated in what is now Sabercat Historical Park and nearby locations. This discovery was documented by Dr. Don Savage from the University of California, Berkeley. Because of this remarkable unearthing, that time period is described as the “Irvingtonian North American Land Mammal Age,” after Fremont’s Irvington District. Very few complete skeletons were found. The skeletons shown to the right are from other North American sites, but illustrate species that were found here., These familiar faces are Irvingtonian mammals, too! Many animals survive nearly unchanged from their Ice Age ancestors, including ground squirrels, raccoons, gophers, and coyotes. Though it sounds like the distant past, on the geologic timescale the Irvingtonian Era is recent history, the dinosaurs had been extinct for 63 million years, and the continents were arranged the same as they are today.