DISCOVERY OF THE FOLLICUCULWS BIPARTITUS-F.CHARVETI RADIOLARIAN ASSEMBLAGE ZONE AND ITS GEOLOGICAL SIGNIFICANCE
DISCOVERY OF THE FOLLICUCULWS BIPARTITUS-F.CHARVETI RADIOLARIAN ASSEMBLAGE ZONE AND ITS GEOLOGICAL SIGNIFICANCE
二叠纪放射虫Follicucullus bipartitus－F．charveti组合带的发现及其地质意义