摘要
报道了内蒙古中部地区几个中新世小哺乳动物化石地点──嘎顺音阿得格、阿木乌苏、查干诺尔、沙拉等的新发现。探索了这些动物群体之间以及它们与经典的中中新世通古尔动物群和最晚中新世二登图动物群之间的关系。初步研究表明，嘎顺音阿得格动物群的时代更可能为早中新世，过去认为有属于晚渐新世的可能性不大。动物群的组成分析说明，中新世时内蒙古中部的生态环境具有浓厚的现代古北区的色彩。
A long history of studies of fossil mammals in the central Net Mongol (Inner Mongolia) can be dated bask to the 1920s and 1930s, when explorations by European and American vertebraic paleontologists were camed out on either sides of the main trail between Zhangjiakou (Kalgan) and Erlian (Erenhot or Iren Dabasu)(Andersson, 1923; Andrews, 1932). Ertemte of the late Miocene and Tunggur of the middle Miocene are classic localities whose fossil mammals serve as standards of comparison in the Neogene terrestrial records of North China. However, mammalian records in these localities represent only short points in the long geologic bine span during the Miocene and considerable gaps exist in our understanding of the faunal succession of this region. Encouraged by the recent successes in collecting small mammals in the classic localities, we screen--washed, in the summer of 1995 and 1996, a number of exposures, most of which have proved fossiliferous. The new localities fall mostly in a triangular area enclosed by three major cities of the region: Zhangjiakou to the south, Erlian to the northwest and Xilinhot to the northeast (Fig.1). Here we briefly report discoveries of a number of small mammal faunas that fill some of the gaps in the geologic record. We attempt to place them in a chronological order based on its faunal components only. Detailed descriptions of the new materials will be presented in separate studies (Table 2).
出处
《古脊椎动物学报》
CSCD
北大核心
1999年第2期120-139,共20页
Vertebrata Palasiatica
基金
美国自然地理学会基金!5527-95
中科院95重点项目!KZ952-J1-410
