The Carboniferous conodont faunal succession of the lower part of Ko-yama Limestone Group was studied.The confirmed upper Visean-lower Moscovian lithostratigraphy of the group is characterized by the clastic carbonate...The Carboniferous conodont faunal succession of the lower part of Ko-yama Limestone Group was studied.The confirmed upper Visean-lower Moscovian lithostratigraphy of the group is characterized by the clastic carbonates with common association of the basaltic pyroclastics and some intercalation of spicular chert beds.The faunal succession of Gnathodus semiglaber(upper Visean),Gnathodus praebilineatus-Lochriea multinodosa(upper Visean),Lochriea ziegleri-Gnathodus girtyi girtyi s.l.(lower Serpukhovian),Neoganthodus symmetricus-Idiognathodus primulus(middle-upper Bashkirian),and Idiognathoides convexus-Gondolella clarki(lower Moscovian) faunas,appears in concordance with the lithostratigraphic order.The faunas are correlative with those from the conodont zones of the Hina,Atetsu,Akiyoshi and Omi limestone groups in the Akiyoshi Belt.The Visean/Serpukhovian boundary of the section was recognized by the FAD of Lochriea ziegleri.展开更多
The study area is located in Kawakami-cho, Okayama Prefecture,which is occupied by Lower Carboniferous to Middle Permian Ko-yama Limestone Group(Yokoyama et al.,1979),Permian Yoshii Group (Sano et al.,1987) and Triass...The study area is located in Kawakami-cho, Okayama Prefecture,which is occupied by Lower Carboniferous to Middle Permian Ko-yama Limestone Group(Yokoyama et al.,1979),Permian Yoshii Group (Sano et al.,1987) and Triassic Nariwa展开更多
文摘The Carboniferous conodont faunal succession of the lower part of Ko-yama Limestone Group was studied.The confirmed upper Visean-lower Moscovian lithostratigraphy of the group is characterized by the clastic carbonates with common association of the basaltic pyroclastics and some intercalation of spicular chert beds.The faunal succession of Gnathodus semiglaber(upper Visean),Gnathodus praebilineatus-Lochriea multinodosa(upper Visean),Lochriea ziegleri-Gnathodus girtyi girtyi s.l.(lower Serpukhovian),Neoganthodus symmetricus-Idiognathodus primulus(middle-upper Bashkirian),and Idiognathoides convexus-Gondolella clarki(lower Moscovian) faunas,appears in concordance with the lithostratigraphic order.The faunas are correlative with those from the conodont zones of the Hina,Atetsu,Akiyoshi and Omi limestone groups in the Akiyoshi Belt.The Visean/Serpukhovian boundary of the section was recognized by the FAD of Lochriea ziegleri.
文摘The study area is located in Kawakami-cho, Okayama Prefecture,which is occupied by Lower Carboniferous to Middle Permian Ko-yama Limestone Group(Yokoyama et al.,1979),Permian Yoshii Group (Sano et al.,1987) and Triassic Nariwa
