Stone Artifacts (IMAGE) New York University Caption Stone artifacts from the Initial Upper Paleolithic at Bacho Kiro Cave. 1-3, 5-7: Pointed blades and fragments from Layer I; 4: Sandstone bead with morphology similar to bone beads; 8: The longest complete blade. Credit Tsenka Tsanova, MPI-EVA Leipzig, License: CC-BY-SA 2.0 Usage Restrictions Use in conjunction with this study 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.