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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
According to the distribution rules of fossils in the strata, the strata of Chuanshan Formation in Shaxian County, Fujian Province can be divided into five fossils from top to bottom: 5) Eoparafusulinapararegularis, 4) Sphaeroschwagerina sphaerica, 3) Zellia chengkungensis, 2) Pseudoschwagerina miha-ranaensis Bands and 1) Triticites shikhanensis compactus band. Based on the comparison with the adjacent areas and some parts of South China, the geological epoch of the upper strata of Chuanshan Formation with the second to fifth fossil belts in this area should be Early Early Permian, the Carboniferous-Permian boundary is Pseudoschwagerinamiharanaensis with the end