• 责任者：Chen Shouming (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Cheng Liren
• 刊名：Geological Bulletin of China
• 出版年：2009
• 卷期：28(12)
• 关键词：□目 ; Fusulinina ; 西藏 ; Tibet
• 页码：p.1725-1729
• 图表：2 illus., 1 plate, 19 refs.
• 分类号：1101
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

The Late Permian in the Northern Qiangtang area was named Raggyorcaka Formation, which contains abundant fusulinds such as Palaeofusulina sinensis Sheng, P. fusiformis Sheng, P. nana Likharev, P. laxa Sheng, P. wangi Sheng, P. minima Sheng et Chang, P. simplex Sheng et Chang, Parananlingella acervula (Sheng et Rui);  Reichelina changhsingensis Sheng et Chang, R. pulchra K. M. -Maclay and R. gaqoiensis Wang, Sheng et Zhang. One fusulind zone named Palaeofusulina zone has been established, comprising two sub-zones: Palaeofusulina minima sub-zone and Palaeofusulina sinensis sub-zone. This study area is abundant in different Fusulinds fossil varieties, which all belong to Cathaysian Tethys type in representative of Late Permian, thus it can be correlated with the Changxing Fusulinds fossil belt in South China.