Hirnantian Glaciation

Chuanlong Mou,Xiuping Wang,Qiyu Wang,Xiangying Ge,Bowen Zan,Kenken Zhou,Xiaowei Chen,Wei Liang

The China Geological Survey Series（2023）

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摘要

The major ice caps in the late Ordovician lay between the base of the N. extraordinarius biozone and lower part of the N. persculptus biozone, consistent with the low values of CIA, CIW and PIA for the Huadi No. 1 well, reflecting a short-lived cold and dry climate from the top of the Wufeng-Guanyinqiao Formation to the base of the Longmaxi Formation in the Huadi No. 1 well. These observations provide geochemical record evidence for Gondwana glaciation at the end of the Ordovician in South China.

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