报告题目：Reef communities and carbon isotope excursions of the Lower Ordovician reveal early escalation of the Great Ordovician Biodiversication Event (GOBE)
报告人：Jongsun Hong, Associate Professor
报告人单位：Kangwon National University
报告时间：7月22日（周一）下午3:30-4:30
报告地点：图书馆三楼报告厅
主办：重点实验室、科技处、人教处
报告简介：
Middle Tremadocian to earliest Floian isotopic carbon excursions are reported from the Lower Ordovician Dumugol Formation in eastern Sino-Korean Platform. These excursions are well-correlated with coeval strata elsewhere. This finding reaffirms that the Top Skullockian Isotopic Carbon Excursion (TSICE) may be correlated globally. It also suggests that the Late Stairsian Isotopic Carbon Excursion (LSICE) would also be useful for inter-regional correlation. First microbial-lithistid Archaeoscyphia reefs in the formation developed in a low-energy deeper subtidal deposits, occurring between the TSICE and LSICE. It represents the habitat expansion of the reef community that invaded into deeper subtidal. A similar phenomenon and emergence of new sessile organisms in shallow subtidal happened in a stratigraphic interval between the two excursions in Laurentia (now Utah, USA) and South China, respectively. These happened in a short span of time within a million year. Such abrupt increases in ecological and taxonomic diversities signify a pulse of the early GOBE, shortly after a possible anoxic event marked by the Top Skullrockian Isotopic Carbon Excursion (TSICE).
报告人简介：
Jongsun Hong副教授于2015年从高丽大学获得博士学位，随后在高丽大学担任Research professor，2017年在Korea Polar Research Institute从事博士后研究，2017年9月进入Kangwon National University工作。在《Journal of the Geological Society of Korea》，《Palaeogeography, Paleoclimatology, Palaeoecology》，《Sedimentary Geology》等期刊发表多篇学术论文。
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