Oregon archaeologists have found evidence of human occupation in the state that dates back more than 18,000 years. University of Oregon students and faculty working at the Rimrock Draw Rockshelter in Harney County found stone tools and fragments of camel and bison teeth beneath a 15,000-year-old layer of volcanic ash. Radiocarbon dating of the tooth enamel revealed that the fragments were 18,250 years old. Due to their position in the ash, the tools are thought to be even older — making them some of the oldest evidence of human civilization in North America.
Joining us with more details about the discovery is Pat O’Grady, a staff archaeologist at the University of Oregon Museum of Cultural and Natural History.