International agreement on the Silurian-Devonian boundary has been reached by selecting the section at Klonk of Barrandian area, Czechoslovakia, as the stratotype and the first simultaneous occurrence of Monograptus u...International agreement on the Silurian-Devonian boundary has been reached by selecting the section at Klonk of Barrandian area, Czechoslovakia, as the stratotype and the first simultaneous occurrence of Monograptus uniformis, Icriodus woschmidti and Warburgella rugulosa rugulosa as the marker of the lowermost Devonian. However, until now only isolated occurrences of these forms have been reported in China. For example, Monograptus of. uniformis was found in the Qinzhou-Fangcheng area, southern Guangxi Province, but unfortunately the geological structure in this area is展开更多
文摘International agreement on the Silurian-Devonian boundary has been reached by selecting the section at Klonk of Barrandian area, Czechoslovakia, as the stratotype and the first simultaneous occurrence of Monograptus uniformis, Icriodus woschmidti and Warburgella rugulosa rugulosa as the marker of the lowermost Devonian. However, until now only isolated occurrences of these forms have been reported in China. For example, Monograptus of. uniformis was found in the Qinzhou-Fangcheng area, southern Guangxi Province, but unfortunately the geological structure in this area is
