X20 Level 33 Sima de las Golondrinas bighorn sheep cuboid bone
Cuboid bone from the ankle of a mountain bighorn sheep (Ovis canadensis), with multiple human-made cut marks inside the grooved muscle insertion feature. Found in metric level 33 of excavation X-20 at Sima de las Golondrinas cave, northern Zacatecas, Mexico. Not directly dated. Chronology based on dating charcoals in related sediments: Late Pleistocene, 16,000—16,500 calibrated years before present (calBP).
Sima de las Golondrinas, Zacatecas, Mex. Excavation X-20 early materials