Silurian conodonts from the Nyalam region, southern Xizang (Tibet), China, and their biostratigraphical and palaeobiogeographical implications
Silurian conodonts from the Nyalam region, southern Xizang (Tibet), China, and their biostratigraphical and palaeobiogeographical implications
复制标题
中国西藏南部聂拉木地区志留纪牙形刺及其生物地层和古生物地理学意义
DOI：
10.1016/j.palaeo.2022.110838
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Zhang Yi-chun
中科院分区：
文献类型：
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作者：
Chen Zhong-yangng;Guo Wen;Fang Xiang;Li Wen-jie;Song Jun-jun;Qie Wen-kun;Zhang Yi-chun
The Silurian conodont biozonation has been well established in many areas of the world, but not yet in China. The Nyalam region of southern Xizang (Tibet) is one of the best locations for studying Silurian conodonts in China. In this paper, we establish five conodont biozonal units from the Pulu Formation: theOzarkodina sagitta sagittaBiozone, theKockelella crassaBiozone, theKockelella variabilis variabilis–Ancoradella ploeckensisZonal Group, thePolygnathoides siluricusBiozone, and the “Ozarkodina”eosteinhornensiss.l. interval Biozone. We assign the Pulu Formation to the Llandovery (upper Telychian) to Pridoli stages based on the conodonts as well as the graptolites from underlying strata. The Silurian conodont species in the Nyalam region are widely distributed in the strata from the Laurussia and Gondwana, which indicates the cosmopolitan characteristic of the conodont fauna from the Wenlock to Pridoli epochs was caused by the circulation of ocean currents.
