记阿坝藏族自治州第四纪原始牛化石

本文记述的原始牛经C~(14)测定,年龄距今26620±600年,产于海拔2400米的黑河阶地。

FOSSILS OF BOS PRIMIGENIUS FROM APA TIBETAN AUTONOMOUS PREFECTURE, SICHUAN

The specimens of Bos primigenius described in this paper include two skulls, scapulae ulna, radius and femer from the Late Pleistocene (C~(14) date about 26, 620±600 years) at Hei-he pasture of Apa Tibetan Autonomous Prefecture, Sichuan. In comparison with others from China, the Hei-he forms are larger in size. The Hei-he specimens seem to be closely comparable with the Beijing specimens described by Hu in the general outline of the skull roof. Fossils of this species have been reported in China from Hebei, Shanxi, Beijing, Nei-Mongol, Gansu, Jilin, Heilongjiang and Taiwan. The finding of this species in China are confined in the region between 105° E longitude and at 35° N latitude except Apa and Taiwan. A survey of the Bos primigenius bearing strata in China was made and proved that these deposits are situated below 1000 m above sea level. The deposit in Apa is situated 3,400 m above sea level. So it can be supposed that the Apa district has uplifted considerably in altitude since Late Pleistocene.