The Discovery of the Pliocene Ancient Dune with Spherical Calcareous Concretions in Hexigten Banner, oft-com:office:smarttags" />
详细信息
- 责任者：Yan Xili (Institute of Geomechanics ; Chinese Academy Geology Sciences ; Beijing 100081 ; China) ; Zhao Xitao
- 刊名：Acta Geoscientica Sinica
- 出版年：2010
- 卷期：31(6)
- 关键词：上新世 ; Pliocene ; 结核 ; concretions ; 沙丘 ; dunes ; 内蒙古 ; Inner Mongolia
- 页码：p.893-896
- 图表：2 illus., 1 plate, 1 ref.
- 分类号：1200
- issnNo：ISSN1006-3021
- isbnNo：CN11-3474/P
摘要
A Pliocene ancient dune was discovered in Baicha River basalt on the southern bank of the Xilamulun River in the northern Chifeng. This discovery proves that Baicha River valley area in the northern Chifeng also had the arid circumstance with strong wind which was required for the formation of an ancient dune,quite similar to the extensive growth of grass dunes in the nearby area. This paper also demonstrates the finding of calcareous concretions with excellent sphericity in the ancient dune,whose diagenesis and ancient climate change significance deserve further investigation.