X20 Level 21 Sima de las Golondrinas pronghorn tibia bone
Tibia (shinbone) of an American pronghorn (Antilocapra americana), with multiple human-made cut marks on the upper shaft and below the proximal articulation. Found in metric level 21 of excavation X-20 at Sima de las Golondrinas cave, northern Zacatecas, Mexico. Not directly dated. Chronology based on dating charcoals in related sediments: Terminal Pleistocene, 13,200—15,200 calibrated years before present (calBP).
Sima de las Golondrinas, Zacatecas, Mex. Excavation X-20 early materials