摘要
通古尔组因盛产哺乳动物化石而闻名于世,其中的孢粉化石却很少有人问津,主要出于其岩性不利于孢粉处理之缘故。我所研究生周晓丹曾在1987年去通古尔采样,带回部分孢粉样品,经笔者分析后,发现了一定数量的孢粉。地层概况样品采自二连浩特市东南约80km 处的准乌古尔狼帐房剖面和都古月剖面。
Tongguer Formation,one of the most famous Neogene fossiliferous strata in China,is well developed in Tongguer(Tung Gur)district located in the southeast part of Erlien,Inner Mongolia.Sporo-pollen assemblage obtained is characterized by the dominent content of Qu- ercoidites,Chenopodipollis,Artemisiaepollenites,and by the moderate amount of Salixipol- lenites,Cyrillaceaepollenites,Tricolpopollenites,along with a few of Betulaceoipollenites,Ulmo- ideipites,Labitricolpites,Rutaceoipollis,Graminidites,Pinuspollenites,Abietineaepollenites,Ep- hedripites and Polypodiisporites etc..A comparison is made between the present assemblage and that from Shangdou-Huade Basin,Inner Mongolia,and the climatic variation tendency re- vealed by these assemblages is contrast with that from the oxygen isotopic records of the DSDP boreholes.The geological age of Tongguer Formation is then assigned to the middle Miocene- late Miocene boundary or the earliest late Miocene,which is a slight later than the result from the vertebrate fossils.
关键词
通古尔组
孢粉组合
中新世
气候
Tongguer Formation
Sporo-pollen assemblage
Miocene
Climate
