报告题目：Vendian (upper Ediacaran) chronostratigraphy of Northern Eurasia: falling into place or falling into pieces?
报告人：Dmitriy V. Grazhdankin 教授
时间：2023年11月28日（周二）上午10:00
报告地点：南京古生物所图书馆三楼报告厅
报告人简介：
Dmitriy V. Grazhdankin，俄罗斯科学院西伯利亚分院特罗菲穆克石油地质与地球物理研究所前寒武纪古生物学与地层学实验室主任，俄罗斯科学院教授，德国哥廷根科学与人文学院高斯教授，曾任国际地层委员会埃迪卡拉系分会副主席（2012-2020）。长期从事埃迪卡拉系古生物学、地层学和沉积学的研究，在Science Advances、Nature Communications、Geology等国际知名期刊发表论文70余篇，被引用3000余次，H指数30。
报告简介：
Late Ediacaran chronostratigraphy is in a state of ferment, stirred by the addition of new geochemical data as well as controversial interpretations of fossils. It appears that biotic evolution proceeded in mostly anoxic environments and was punctuated by episodic oxygenation, global-scale euxinia, and alkalinity events. The late Ediacaran heterogenous redox landscape determined the course of macroevolution and macroecology, whereas the alkalinity events could control the discrete nature of early diagenetic cementation of aluminosiliciclastic sediments, and fossilization of soft-bodied organisms. This effectively reduces the fossil record giving only glimpses into the true evolutionary history.
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