First phalanx of a mountain bighorn sheep (Ovis canadensis), with multiple human-made cut marks and carvings all around its surface. Possible portable art object. Found out of context in the surface collecting area 0-G, possibly excavated by early 20th century explorers from an old exploration pit at Sima de las Golondrinas cave, northern Zacatecas, Mexico. Not directly dated. Chronology unknown, presumed Late Pleistocene.
Sima de las Golondrinas, Zacatecas, Mex. Excavation X-20 early materials