@inbook{fd6627c760e64c25a0d53cddfb0b6757,
title = "The Late Maastrichtian R{\o}rdal Member (Denmark): a remarkable window of climatic, environmental and biotic changes at orbital timescales",
abstract = "The Late Maastrichtian R{\o}rdal Member of the M{\o}ns Klint Formation is a remarkable lithological unit of the Danish Basin, characterized by chalk–marl cyclicity, standing out from pure Maastrichtian white chalk within the Chalk Group. A cyclostratigraphic analysis across this unit suggests a control by orbital precession and a strong amplitude modulation of the precession by the 405 kyr eccentricity cycle. Oxygen isotope data from bulk carbonate, benthic foraminifera and brachiopods indicate a prominent cooling commencing at the base of the unit, with maximum cooling aligned with a 405 kyr amplitude modulation maximum. This unit thus represents a rare example of a climatic cooling associated with a 405 kyr insolation maximum. However, geochemical and calcareous nannofossil data support lower productivity levels across the unit, in contradiction to an expected ocean fertilization accompanying enhanced continental weathering as the source of the clay material. An alternative model of deposition for this lithological unit is thus proposed via dense water cascading favoured by a sea-level low, subsequent restriction of the Chalk Sea and associated gravity currents responsible for the resuspension of fine clastic deposits from the margins of the Baltic Shield.",
author = "Nicolas Thibault and Lauridsen, {Bodil W.} and Schovsbo, {Niels H.} and Kresten Anderskouv and Bjerrum, {Christian J.} and Christoph Korte and Mathieu Martinez and Caterina Morigi and Lars Stemmerik and Ullmann, {Clemens V.}",
note = "Publisher Copyright: {\textcopyright} 2024 The Author(s). Published by The Geological Society of London.",
year = "2025",
month = mar,
day = "31",
doi = "10.1144/SP545-2023-124",
language = "English",
isbn = "978-178620-610-7",
volume = "2",
series = "Geological Society, London, Special Publication",
publisher = "Geological Society of London",
pages = "399--429",
editor = "M.B. Hart and S.J. Batenburg and B.T. Huber and G.D. Price and N. Thibault and M. Wagreich and I. Walaszczyk",
booktitle = "Cretaceous Project 200",
address = "United Kingdom",
}