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贵州习水良村剖面地层发育齐全,是目前所知上扬子地区出露最为完整的奥陶系剖面之一。该剖面海相碳酸盐岩发育,具备优越的牙形石生物地层研究条件。本次,笔者等于此获得了丰富的牙形石标本,经研究建立了16个牙形石带,由下至上分别为Monocostodus sevierensis带,Cordylodus angulatus带,Glyptoconus quadraplicatus带,Tripodus proteus带,Triangulatus bifidus带,Serratognathus diversus带,Oepikodus communis带,Oepikodus evae带,Baltoniodus triangularis带,Baltoniodus navis带,Paroistodus originalis带,Baltoniodus aff.navis带,Lenodus antivariabilis-L.variabilis组合带,Pygodus serra带,Hamarodus brevirameus带以及Protopanderodus insculptus带。
The strata of the Xishuiliangcun section in Guizhou are well developed and are one of the sections of the Ordovician that is currently the most intact in the Upper Yangtze region. The profile of marine carbonate rock development, with excellent conodont biological strata conditions. This time, the author obtained abundant conodont specimens, and established 16 conodont belts by research, from bottom to top, including Monocostodus sevierensis, Cordylodus angulatus, Glyptoconus quadraplicatus, Tripodus proteus and Triangulatus bifidus , Serratognathus diversus, Oepikodus communis, Oepikodus evae, Baltoniodus triangularis, Baltoniodus navis, Paroistodus originalis, Baltoniodus aff. Navis, Lenodus antivariabilis-L.variabilis, Pygodus serra, Hamarodus brevirameus and Protopanderodus insculptus band.