Geochemical characterisation of belemnite rostra from North-West Bohemia (Upper Cenomanian) - A contribution to palaeoenvironmental interpretation of a peri-Tethyan shelf

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10446257" target="_blank" >RIV/00216208:11310/22:10446257 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Geochemical characterisation of belemnite rostra from North-West Bohemia (Upper Cenomanian) - A contribution to palaeoenvironmental interpretation of a peri-Tethyan shelf

Original language description

The Bohemian Cretaceous Basin (BCB), the largest intracontinental basin within the Bohemian Massif extends across Saxony, Bohemia, Moravia and Silesia (Čech 2011). The preserved rocks within the BCB are possibly from the Lower (?Albian) to Upper Cretaceous (Cenomanian to Santonian). We present studied rock sequences herein belonging to Oceanic Anoxic Event II (OAE II). High-resolution climate records reveal considerable changes in temperature, carbon cycling, and ocean chemistry during this climatic perturbation. A cooling phase is preserved within the English Chalk based on an invasive Boreal fauna and bulk oxygen-isotope excursions registered during the early stages of OAE II. Here we describe the occurrence and geochemical characteristics of the belemnite species Praeactinocamax plenus (Blainville, 1827) within the BCB. This Upper Cenomanian representative of fauna from the Metoicoceras geslinianum Zone is documented and morphologically well described. Its occurrence indicates the change of the palaeoenvironmental aspects, which is called Plenus Cold Event (PCE). An abundance of this species is low except the so-called Plenus-beds (calcareous siltstones). P. plenus is also characteristic in limestones, marl/limestone alternations, and had preference of shallower water environments. A phenomenon known as the Plenus Cold Event has tentatively been correlated with climatic shifts worldwide.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GC21-30418J" target="_blank" >GC21-30418J: Linking high- and mid-latitude sedimentary archives of the Late Cretaceous greenhouse: correlations between Northern Siberia and Central Europe</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů