摘要
１９８５年，曹伯勋等在周口店太平山北坡发现了一个早更新世洞穴－洼地堆积地点（东洞），并作了初步报导。１９９２～１９９３年，笔者又对该剖面进行了哺乳动物化石的系统采集工作，获得了丰富的化石，为确定东洞动物群的性质及该剖面地层时代提供了确凿证据。研究表明该地点堆积物形成于１．６７～０．９７ＭａＢ．Ｐ，太平山组应包括整个剖面。
he East cave is about 2 km from the famous Locality I (Homo erectus pekinensis site) of Zhoukoudian, Beijing. Its sediments consist of the cave-fissure gravel, sand and clay beds, and are lithologically divided into 13 beds. During 1992 to 1993, the first author collected a number of mammal fossils from the deposits of the East cave, especially the bed 7 and bed 8 of this section. The remains are identified 29 species belonging to 23 genera of Rodentla, Lagomorpha, Insectivora, Carnivora and Artiodactyla. They mainly are Alilepus zhoukoudianensis sp. nov., Sciurotamias praecox, Allocricetus ehiki, A. ? teilhardi, Cricetinus varians, Hyperacrius yenshanensis, Allophaiomys of. pliocaenicus, Proedromys of. bedfordi, Apodemus dominans, Niviventer preconfucianus, Chardinomys nihewanicus and so on.All of these fossil mammals are the important members in the Early Pleistocene in China.They show that the East cave deposits formed in the Early Pleistocene.The magnetic polarity section of the East cave was given by Cao Boxun(1989). By correlation with E. A. Mankinen's (1979) magnetic polarity time scale it suggests that the East cave deposits cover from the Olduvial event (1. 67 Ma B. P. ) to the Jaramillo event (0. 97 Ma B. P. ) in age. Therefore the Taipingshan Formation may be correlated with the Loc. 12. Both of them belong to middle Early Pleistocene in age.
出处
《现代地质》
CAS
CSCD
1995年第4期441-449,共9页
Geoscience
基金
国家计委专项资助
北京市地质矿产局资助
