The Discovery of Late Bathonian-Early Callovian Ammonites in the Middle of Northern Qiangtang Basin, Tibetan Plateau
详细信息
- 责任者：Zeng Shengqiang (Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Wang Jian
- 刊名：Geological Bulletin of China
- 出版年：2012
- 卷期：31(4)
- 关键词：中侏罗世 ; Middle Jurassic ; 菊石 ; Ammonites ; 羌塘盆地 ; Qiangtang Basin
- 页码：p.521-527
- 图表：3 illus., 2 plates, 35 refs.
- 分类号：1103
- issnNo：ISSN1671-2552
- isbnNo：CN11-4648/P
摘要
Recently, a number of ammonites were discovered in the Bandao Lake area of northern Qiangtang Basin, ranging in age from the Late Bathonian to Early Callovian (Middle Jurassic). The ammonite assemblages sampled in the Changhong River area are of good preservation and have obvious features, thus providing a solid basis for comparison with the Western Tethys ammonoid zones. According to the comparison with regional ammonoid assemblages, the fossiliferous strata are probably Xiali Formation instead of the lower part of the Suowa Formation. The discovery of the Late Bathonian-Early Callovian ammonoid assemblages is of great importance for the understanding of sedimentary-tectonic evolution of the Qiangtang Basin.