福建沙县船山组■类生物地层——兼论石炭系-二叠系界线

根据地层中类化石的分布规律 ,福建沙县船山组地层自上而下可划分为 5个化石带 :5 ) Eoparafusulinapararegularis带 ,4 ) Sphaeroschwagerina sphaerica带 ,3) Zellia chengkungensis带 ,2 ) Pseudoschwagerina miha-ranaensis带和 1) Triticites shikhanensis compactus带。通过与邻区及我国华南部分地区的对比 ,认为本区含第 2至第 5个类化石带的船山组上部地层的地质时代应为早二叠世早期 ,石炭系 -二叠系界线位于 Pseudoschwagerinamiharanaensis带之底

BIOSTRATIGRAPHY OF THE CHUANSHAN FORMATION OF SHAXIAN IN FUJIAN WITH COMMENTS ON THE CARBONIFEROUS-PERMIAN BOUNDARY

The present paper introduces the strata of the Carboniferous Chuanshan Formation in Shaxian, Fujian. According to the distribution of fusulinid fossils in the strata, the fusulinids may be distingushed into 5 zones in descending order as follows: 5) Eoparafusulina pararegularis Zone, 4) Sphaeroschwagerina sphaerica Zone, 3) Zellia chengkungensis Zone, 2) Pseudoschwagerina miharanaensis Zone and 1) Triticites shikhanensis compactus Zone. Compared with those in the nearby regions and some other areas in South China, the geological age of the second to the fifth fusulinid zones of the Chuanshan Formation in Shaxian should be early Early Permian and the Carboniferous Permian boundary should be placed at the base of Pseudoschwagerina miharanaensis Zone in the Chuanshan Fromation.