Mylonite Arrowheads (IMAGE) University of Seville Caption Mylonite arrowheads found in the Montelirio tholos: Photography: Miguel Ángel Blanco de la Rubia. Credit ATLAS Research Group (University of Seville) 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.