山西屯留西村早更新世地层

山西屯留西村的早更新世地层,位于长治盆地的西北隅,属山间盆地。由于地层出露好,并含有丰富的哺乳动物化石,对于确定这一地区第四纪地层的时代划分和对比很有意义。由于在该盆地中沉积了不同时代的河湖相和土状堆积,上、下层位和接触关系清楚,因此,对长期以来有争议的“晋东南红土”或“R红土”的解决有所帮助。尽管到目前为止,在“R红土”中没有找到可靠的化石依据,但它的上、下层位为河湖相沉积,并含有丰富的哺乳动物化石。所以,它被限制在中更新世早期和早更新世初期之间。

THE EARLY PLEISTOCENE IN TUNLIU, SHANXI

On the basis of the contact between the strata, their lithological characteristics and fossil remains, the Pleistocene in Tunliu, southeastern Shanxi, may be subdivieed into three formations from above to below. 1. The Xiaochangcun Formation: The fluviolacustrine series. Grey-yellowish, greygreenish sands, mild clays and clays. More than 10 metres. The mammal fossils include Myospalax tingi, Canis varibilis, ? Archidiskodon sp. Equus sanmeniensis, Coelodonta antiquitatis, Sus lydekkeri etc., Judging from the fossils and the contact between the strata the Xiaochangcun Formation would represent the Early stage of the Middle Pleistocene. 2. The Daqiang Formation: The red sandy clays spread widely in southeastern Shanxi. It did not yield any fossil. Sometimes more than 10 metres. 3. The Xicun Formation: The fluviolacustrine deposits. Light violet, yellowgreenish and grey sands, sandy clays and clays. More than 20 metres. The mammalian fossils yielded in this formation are abundant: Mimomys cf. banchiaonicus Lutra cf. licenti Stegodon cf. chiai Proboscidipparion sinense Hipparion sp. Coelodonta antiquitatis Axis shansius Cervus (Rusa) elegans Cervus sp. Gazella sinensis Gazella cf. blacki Gazella sp. Capreolus sp. Bison sp. All of them are widely distributed in the early stage of the Early Pieistocens in northern China. There are a few relic species of Phocene. The Xicun Fauna may be correlated with the Nihowan or Xihodu Fauna. Consequently, the Daqiang Formation would represent the late parts of the early pleistocene, but it may represent the early parts of the Middle Pleistocene too.