Stratigraphic map of site (IMAGE) Oregon State University Caption Stratigraphic model of the Cooper’s Ferry site, showing the distribution of cultural features (e.g., fire hearths, pits), radiocarbon and optically stimulated luminescence ages, sediment layers and buried soils as exposed by excavations in Area A and Area B. Credit Courtesy Loren Davis Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.