两淮煤田太原组的蜓类分带

本文研究的蜒类计有17属91种,包括1未定种。根据蜒类动物群的垂直分布情况,两淮煤田上石炭统太原组可建立Sphaeroschwagerina带,并自下而上进一步细分为2亚带:(1).Quasifusulina gracilis-Boultonia willsi亚带;(2).Sphaeroschwea-gerina subrotunda亚带。必须指出,山西太原组的Triticites simplex带在两淮地区未见到,两淮煤田太原组可能只相当于庙沟石灰岩至东大窑石灰岩的层位,其时代应属晚石炭世中、晚期

Zoning of Fusulinids in Taiyuan Formation in Huainan-Huaibei Coalfield

Fusulinids studied in this paper are of 91 species in 17 genera, including 1 unnamed species. According to the vertical distribution of fusulinid faunas, it is possible to verify the existence of a Sphaeroschwagerina zone in the late Carboniferous Taiyuan Formation in Huainan-Huaibei Coalfield, a zone which can be further grouped into two subzones: ( 1 ) Quasifusulina gracilis-Boultonia willsi subzone, ( 2 ) Sphaeroschwagerina subrotunda subzone. It should be pointed out that Triticites simplex zone of the Taiyuan Formation in Shanxi has not been found in Huainan-Huaibei area, for it is most probably equivalent to the horizon ranging from Miaogou limestone to Dongdayao limestone, with an age between middle and late Late Carboniferous