STUDY ON THE FUSULINIDA FAUNA IN THE TAIYUAN FORMATION FROM THE EAST AREA OF JINING COALFIELD, SHANDONG PROVINCE

By a systematic study of the fusulinida fauna in the Taiyuan Formation from the east area of Jining coalfield, Shandong Province, 15 genera and 108 species of Fusulinida fossils have been found. According to the geographical distribution and vertical variation of fusulinid fossils in the strata, the fusulinids may be distinguished into 1 assemblage and 3 subassemblages as following(in descending order): Ⅰ. Pseudoschwagerina assemblage,3). Boultonia willsi Schwagerina cervicalis subassemblage, 2). Pseudofusulina sphaeroidea Schwagerina neolata subassemblage, 1). Rugosofusulina complicata Quasifusulina longissima subassemblage. Compared with those in nearby regions and some other areas in North China, the geological age of the fusulinid fauna in the Taiyuan Formation of Jining coalfield should be early Early Permian, and the boundary between Carboniferous and Permian in the east area of Jining coalfield should be placed at the bottom of NO.11 limestone in the lower portion of the Taiyuan Formation.