论文部分内容阅读
在中国古北界的东北区、华北区及蒙新区三区交汇地带的秦皇岛地区洞穴堆积中发现具有明显的过渡区特征的山羊寨动物群,动物群以小哺乳动物化石为主,包含3个动物地理区的代表成分,可与中更新世周口店动物群(华北区)、金牛山动物群(东北区)等进行对比.在已鉴定的53种哺乳动物中,有38种在中更新世周口店或金牛山动物群名单之列,与周口店动物群相同的有29种,与金牛山动物群相同的有25种,与萨拉乌苏动物群相同的有7种,分别占总数的76%,66%和18%,动物群组成特点及其所处的地理位置,可能暗示着中国古北区的3个亚区在中更新世期间就已经初步形成.
In the pits of Qinhuangdao area in the northeast, north China and Mengxin districts of the Gubeiku area, there are found goat herds with obvious transitional zones. The fauna is dominated by small mammalian fossils and contains three The representative components of the animal geographical area can be compared with those of the Central Zhoukoudian fauna (North China area) and Jinniu mountain fauna (Northeast area) of the Central Pliocene, etc. Among the 53 mammals identified, 38 were found in the middle Pleistocene Zhoukoudian Or Jinniu Mountain fauna, 29 species are the same as those of Zhoukoudian fauna, 25 species are the same as Jinniushan fauna, 7 species are the same as Saraussu fauna, accounting for 76% of the total, 66% and 18% respectively. The characteristics of the fauna assemblages and their geographical location may suggest that the three sub-regions of the Gubei area were initially formed during the Middle Pleistocene.