Early Cretaceous Silicified Woods from the Yingen-Ejinaqi Basin, Inner Mongolia and Their Sedimentary Environment
详细信息
- 责任者：Zhang Mingzhen (Key Laboratory of Western China’s Environmental Systems ; MOE ; Research Institute of Arid Environment and Climate Change ; Lanzhou University ; Lanzhou 730000 ; China) ; Dai Shuang
- 刊名：Acta Geologica Sinica
- 出版年：2013
- 卷期：87(8)
- 关键词：木化石 ; fossil wood ; 内蒙古 ; Inner Mongolia
- 页码：p.1059-1066
- 图表：7 illus., 22 refs.
- 分类号：1102
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
Yingen-Ejinaqi Basin,a Mesozoic-Cenozoic intermountain petroliferous basin in Inner Mongolia,northern China,is largely filled by the Cretaceous alluvial-fluvial-lacustrine clastic sediments interbedded with volcanic layers.Two sites of well-preserved silicied woods were discovered in the Lower Cretaceous Bayingebi Formation and Suhongtu Formation in the southeastern Basin.In this paper,we firstly described the taphonomic characteristics and morphological structures of silicied woods and then discussed the climatic environment when they buried based on the palynologic datas.In addition,palynological samples were collected from the upper Bayingebi Formtion and lower Suhongtu Formtion.The palynological study suggests a late Early Cretaceous age,and also reflects a wet and warm climate in this area.According to the lithological characters,the first locality of the fossil woods was rapidly buried by intermittent floods,debris flows deposits.And the second ones was suddenly covered by pyroclastic deposits which possibly occurred at the late Early Cretaceous period on the basis of published dates.
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