中国科学院南京地质古生物研究所机构知识库

Three stratigraphic sections in the Cambrian of China that contain complete successions across important biohorizons having chronostratigraphic value, and that may be useful for developing Cambrian stage or series boundaries, are reviewed. The Wuliu section (Guizhou, South China), contains the FAD of Oryctocephalus indicus at 58.2 m above the base of the Kaili Formation. The Wangcun North section (Hunan, South China), contains the FADs of Ptychagnostus (or Acidusus) atavus, Ptychagnostus punctuosus, and Lejopyge laevigata at 1.2 m, 56.7 m, and 111.3 m, respectively, above the base of the Huaqiao Formation. The Xiaoyangqiao section (Jilin, Northeast China), contains the FAD of Cordylodus proavus in the Fengshan Formation at 10.89 m above the zero point of the section. A fourth potential stratotype section, the Wangcun South section (Hunan, South China), which contains the P. atavus, P. punctuosus, and L. laevigata zones, is discussed briefly. (C) 2004 Elsevier SAS. All rights reserved.