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乌兰花哺乳动物群发现于内蒙古四子王旗的晚中新世红土剖面底部.中国的红黏土堆积相当广泛,其中富含三趾马动物群化石,在山西、陕西、河南和甘肃都有众多化石地点.蒙古高原也是新近纪沉积非常发育的地区,尤其是在内蒙古中部,已建立起哺乳动物群序列.乌兰花动物群的发现进一步完善了这个序列,并且对于三趾马动物群的地理分布和红黏土的气候环境背景也具有重要的指示意义.乌兰花动物群中的化石种类大多数与保德动物群相同或很接近,也有一些与保德动物群相比在系统演化水平上稍高,可能代表比后者略晚的地质时代,其年龄约为距今7Ma.乌兰花动物群的组成表明,当时该地区周围可能是典型的温带稀树草原环境,为确定中国北方晚中新世三趾马动物群东西分区的界线提供了直接证据.
The Wulanhua mammal group was found at the bottom of the late Miocene red clay profile of the Siziwang Banner in Inner Mongolia, China. Red clay accumulates quite extensively, and is rich in fossils of the Trippodon fauna, with numerous fossil sites in Shanxi, Shaanxi, Henan and Gansu. The Mongolian plateau is also a region where the Neogene sediments are very developed. Especially in central Inner Mongolia, the sequence of mammalian groups has been established. The discovery of the Wulanhua fauna further perfected the sequence, and the geographical distribution of the three-eared equine fauna and that of red clay Of the climatic and environmental background is also an important indicator.Fuhuahua animal fossils in the majority of the same or very close with the Baode animal group, there are some compared with the Baode fauna in the system evolution level slightly higher, may represent The geologic age slightly later than the latter, its age is about 7 Ma. The composition of Wulanhua fauna shows that at that time the area around the typical temperate savannah environment may be, in order to determine the northern Miocene The division of fauna and flora provides direct evidence.