X20 Level 11 Sima de las Golondrinas ischium bone
Presumed ischium bone, part of ox coxae (lower pelvis), from a Homo sp. child. Found in metric level 11 of excavation X-20 at Sima de las Golondrinas cave, northern Zacatecas, Mexico. Not directly dated. Chronology based on dating charcoals in related sediments: Early Holocene, 9400—11,700 calibrated years before present (calBP).
Sima de las Golondrinas, Zacatecas, Mex. Excavation X-20 early materials