Dinosaur Tooth (IMAGE) California Institute of Technology Caption This is a Camarasaurus tooth from the Jurassic Morrison Formation of North America that was analyzed in the study by Eagle et al. Credit Thomas Tütken (Bonn University) 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.