Cysty Dinoflagellata z górnego kampanu i najniższego mastrychtu (górna kreda) profilu środkowej Wisły – stratygrafia i paleoekologia

Q4 Earth and Planetary Sciences Przeglad Geologiczny Pub Date : 2022-11-24 DOI:10.7306/2022.28

M. Niechwedowicz

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Abstract

Maastrichtian succession of the Middle Vistula River section (central Poland), four taxa (Callaiosphaeridium bicoronatum, Odontochitina dilatata, Oligosphaeridium araneum and Samlandia paucitabulata) have been described as new. An analysis of the distribution of particular dinoflagellate cyst taxa enabled the development of a highly resolved biostratigraphic framework, calibrated against other biozonal schemes (based, among others, on inoceramid bivalves, ammonites and belemnites), formerly established for the succession. A comparison of the Middle Vistula River record with the dinoflagellate cyst ranges documented in other European successions enabled correlations with selected sections in Belgium, the Netherlands, southern Germany and northern Italy, and with the Campanian/Maastrichtian boundary stratotype section in Tercis les Bains, southwest France. A palaeoecological analysis of the dinoflagellate cyst assemblages and of other components of phytoplankton communities revealed a well-defined trend in sea-level fluctuations (likely of eustatic origin), and palaeoclimatic changes probably related to the latest Cretaceous cooling episode, as

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来自上层活动和维斯瓦河中部最低玛蹄脂（上层白垩）剖面的甲藻囊——地层学和古生态学

在波兰中部的Vistula河中段的Maastrichtian演替中，4个分类群(Callaiosphaeridium bicoronatum, Odontochitina dilatata, Oligosphaeridium araneum和Samlandia paucitabulata)被描述为新的。对特定鞭毛藻囊群分布的分析使我们能够发展出一个高度确定的生物地层框架，并参照以前为演替而建立的其他生物分区方案(除其他外，以双壳类、菊石和蛭石为基础)进行校准。将维斯瓦河中部的记录与其他欧洲演替中记录的鞭毛藻囊肿范围进行比较，可以与比利时、荷兰、德国南部和意大利北部的选定剖面以及法国西南部Tercis les Bains的坎帕尼亚/马斯特里赫特边界层型剖面进行比较。对鞭毛藻囊群和浮游植物群落其他组成部分的古生态学分析揭示了海平面波动的明确趋势(可能是海平面上升的起源)，古气候变化可能与白垩纪晚期的降温事件有关

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Przeglad Geologiczny Earth and Planetary Sciences-Geology

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