REVISION OF MIDDLE JURASSIC WANBAO FORMATION AROUND CHINAMONGOLIA BORDER IN THE WEST OF MANZHOULI, INNER MONGOLIA
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摘要: 2006~2008年在内蒙古满洲里西中蒙边境一带开展1：5万区域矿产调查时，在原1：20万划分为伊列克得组浅黄灰色泥质粉砂岩中首次采集了中侏罗世化石：Sphenobaiera angustiloba（窄叶契拜拉）、Schizoneura等植物及Euestheria Ziliuingensis（自流井真叶肢介）、E. haifanggouensis（海房沟真叶肢介）等.根据岩石地层对比及古生物特征，将其下部碎屑岩与火山岩划分开，重新将碎屑岩部分厘定为中侏罗统万宝组.Abstract: During mapping in the west of Manzhouli, Inner Mongolia near the China-Mongolia border from 2006 to 2008, the Middle Jurassic fossils were collected from the pale yellowish gray pelitic siltstone, which had been originally assigned to the Yiliekede formation in the 1:200 000 regional surveys. Those include plant fossils of Sphenobaiera angustiloba and Schizoneura, as well as Conchostraca fossils of Euestheria Ziliuingensis and E. haifanggouensis. Based on stratigraphic correlation and paleontological characteristics, the clastic rock in the lower part of the series is separated form the volcanic rocks and re-determined as the Middle Jurassic Wanbao formation.
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Key words:
- Middle Jurassic /
- Wanbao formation /
- China-Mongolia border /
- Manzhouli
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