【作者】 黄宝玉； 周晓丹；

【Author】 Huang Baoyu Chou Xiaodan (Nanjing Institute of Geology and Palaeontology,Academia Sinica)

【机构】 中国科学院南京地质古生物研究所；

【摘要】 <正>一、前言内蒙古锡林郭勒盟中新统通古尔组是1928年美国自然历史博物馆中亚考察团在二连东南查干诺尔通古尔地区建组的。该组地层层序简单,,出露良好,除产有丰富的瓣鳃类化石外,还有复足类、古脊椎动物等,是研究我国第三纪地层和古生物的重要地区之一,引起中外学者的重视。Spock(1929)、张席(1931)、Leroy(1940)、周明镇(1959)、内蒙古地矿局区测队(1978)、李传夔(1984)、内蒙古地矿局水文地质队(1986)、邱占祥(1987)等都对通古尔组地层和古生物作过研究,但对瓣鳃类却研究很少,只有 Leroy(1940)作了零星的报导。更多还原

【Abstract】 The non—marine Miocene desposits are well developed in Tongguer Formation of Ximeng,Inner Mongolia.There are a great number of freshwater lamellibranch faunas. together with gastropods and other kinds of vertebretes.The Stratigraphy and Palaeon- tology of Tongguer Formation has been reported by various auther (L.E.Spock,1929、 Chang Hsi—chih,1931、P.Leroy,1940,Chow Ming—zhen,1959、Qiu Zhan—xiang et al.,1987……).During the summer of 1987,the writers were engaged in geological re- searches on the Tertiary strata in Duguyue and Langzhangfang of the Tangguer region and collected many lamellibranch fossils from Miocence strata.This paper only discusses environment of lamellibrarich in Miocence period.It is suggested from our present result that the lamellibranch once lived in a water depth of 3—5metere nearing the reaches of a middle—sized lake in the early—minddle stages of the Tongguer formation,and the living condition changed to be a wider river—lake environment at the late stage of the Tongguer Formation.更多还原