Stratigraphic Section (IMAGE) Desert Research Institute Caption Soil layers (stratigraphy) identified at the Gault Site along with the cultural periods identified. Credit Credit: Produced by A Gilmer, The Gault School of Archaeological Research. Usage Restrictions None License Licensed 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.