A Rugged Stretch of the Channel Islands (IMAGE) California Academy of Sciences Caption The study team conducts a shoreline survey of prehistoric Chumash sites, which often contain discarded abalone shell. Credit © 2015 Todd Braje Usage Restrictions Photo credits mandatory. For editorial use only. 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.