摘要
根据近20年来古生物学研究,准噶尔盆地北缘的古新世和始新世地层可划分为依希伯拉组和化石沟组。前者时代依植物群归入占新世,后者据哺乳动物化石其时代应为中、晚始新世。
Deposits of Paleocene and Eocene, exposed widely in the north part of Junggar basin, can be subdivided into two formations, the Ugbulak formation and the Huashigou formation. Fossil charophytes, Stephanochara breviovalis, Gobichara deserta and Nemegtichara prima, have been found in the Ugbulak formation. These fossils are common in the late Paleocene in Central Asia. In Sangequan area, the Huashigou formation contains some mammal fossils: Hyopsodus huashigouensis, cf. Mesonyx uqbulakensis, cf. Metahapalodectes sp., Pantolambdodon sp., Metacoryphodon sp., Uintatherium cf. insperatus, Schlosseria magister, and Breviodon minutus. The mammal assemblage shows that age of the fossiliferous beds are equivalent to Arshantan(M. Eocene). In Jimunai-Buerjing area a few teeth of Hyaenodon and anthracotheriid, which are thought to appear in late Eocene, are found from the same formation. Therefore, the deposition of the formation may be extended to a later period.
出处
《石油学报》
EI
CAS
CSCD
北大核心
1992年第2期116-120,共5页
Acta Petrolei Sinica
