摘要
泥盆系和石炭系的界线,是国际上地层古生物学者长期争议的问题之一。1927年首届国际石炭纪会议曾确认爱特隆层(Etroeungt)为石炭系的最低层位;但1935年第二届国际石炭纪会议则重又决议以菊石的下限为石炭系底界。Sandberg and Ziegler等总结了近年来泥盆、石炭系分界上下地层的牙形刺,认为带在世界上有着广泛的地理分布,其下限又与的下限相同,可作为石炭系底部的化石带。
Abstract
The present paper is based on the study of conodont sequence of Uppermost Devonian and Lower Carboniferous collected from 15 sections in Guizhou province and adjacent areas of South China.As proposed by the author,the conodont sequence of Uppermost Devonian and the lower part of Lower Carboniferous consists respectively of 7 zones in South China.From below,they are: (Uppermost Devonian) ;2.;3.;4.;5.;6.;7.;(Lower Carboniferous) 8.;9.Lower ;10.Upper ;11.;12.Lower ;13.-Upper ;14..cf.coneiformis.They can be well correlated with those of West Europe and North America (for Upper Devonian see Ziegler,W.,1962;for Lower Carboniferous see Sandberg,C.A.et al,1978—Tab.1 and 4).It is suggested that the Devonian-Carboniferous boundary should be drawn between the zone and zone occurring in Muhua section of south Guizhou Province (see table 3).This section and its correlation with those of Guizhou Province and the adjacent areas are shown in fig.4 and 5.Based on the absence of and ,the "Wangyou formation" established by Wang C.Y.and Wang Z.H.(1978),may lack the basal part of the Lower Carboniferous sediments Therefore,the author set forth the Muhua formation to substitute the "Wangyou formation".
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