Obsidian Projectile Point (image) Geological Society of America Caption Projectile point (height ~25 mm) made from Obsidian Butte obsidian, collected west of Palomar Mountain in northern San Diego County (SDI-615), California, USA, and attributed to the Luiseño cultural territory. Sample courtesy Fowler Museum at UCLA (archaeology collection no. 217-4). Photo credit: Janet C. Harvey (see Schmitt et al., http://dx.doi.org/10.1130/G33634.1). Credit Photo credit: Janet C. Harvey Usage Restrictions Credit to author of paper and to photographer 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.