中国晚石炭世达拉阶标准剖面的

LATE CARBONIFEROUS FUSULINIDS FROM THE TYPE SECTION OF DALAAN STAGE IN CHINA

详细研究达拉阶标准剖面的化石 ,计有 14属 74种及亚种 ,其中未定种 1种 ,建立 6个化石带 ,自下而上依次为 :Profusulinellapriscoidea P .parva带 ,Profusulinellaaljutovica Taitzehoellataitzehoensisextensa带 ,Fusulinellaobesa F .eopulchra带 ,Fusulinalanceolata Fusulinellavozhgalensis带 ,Fusulinapakhrensis Pseu dostaffellaparadoxa带及Fusulinacylindrica F .quasifusulinoides带。标准剖面的达拉阶应与国际地层表中的巴什基尔阶上部和莫斯科阶相当。

The present paper studies in detail the fusulinids from the stratotype section of the Dalaan Stage. The fusulinids of 74 species and subspecies belonging to 14 genera, including 1 unnamed species (as shown in table 1) are described and illustrated. Six major fusulinid zones have been established in ascending order as follows: 1) Profusulinella priscoidea-P. parva Zone, 2) Profusulinella aljutovica-Taitzehoella taitzehoensis extensa Zone, 3) Fusulinella obesa-F. eopulchra Zone, 4) Fusulina lanceolata-Fusulinella vozhgalensis Zone, 5) Fusulina pakhrensis-Pseudostaffella paradoxa Zone and 6) Fusulina cylindrica-F. quasifusulinoides Zone. At the stratotype section, the Dalaan stage is corresponding to the upper part of Bashkirian and the most part of Moscovian of the international stratigraphic chart (as shown in table 2) or the combination of Atokan and Desmoinesian of North America.