Pinnacle Point Cave Research Site, South Africa (image) Arizona State University Share Print E-Mail Caption The research team has been excavating caves at Pinnacle Point, South Africa, for nearly 20 years. Glass shards from Mount Toba were discovered at the PP5-6 location. Credit Image credit Erich Fisher. Usage Restrictions Image may be used only by media outlets for articles related to this research release. Share Print E-Mail 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.