PP13B Ancient seashells and ochre (IMAGE) Arizona State University Caption Ancient shells (left side) and red ochre (right) have been discovered at site PP13B, which have been significant to understanding that the early modern humans harvested seafoods and used red ochre for possible body ornamention. Credit SACP4 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.