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When were the straits between the Baltic Sea and the Kattegat inundated by the sea during the Holocene?

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

DOI

  • Ole Bennike, Geological Survey of Denmark and Greenland
  • ,
  • Jørn Bo Jensen, Geological Survey of Denmark and Greenland
  • ,
  • Niels Nørgaard-Pedersen, Geological Survey of Denmark and Greenland
  • ,
  • Katrine Juul Andresen
  • Marit Solveig Seidenkrantz
  • Matthias Moros, Leibniz Institute for Baltic Sea Research
  • ,
  • Bernd Wagner, University of Cologne

The timing of the flooding of the Danish/German/Swedish straits and the first marine influence in the Baltic Basin after the Ancylus Lake stage has been much debated. Here we present 47 new radiocarbon ages from sediment cores retrieved from Danish waters, ages that record the marine transgression of the area. Most of the ages are based on shells of marine molluscs, hence the ages are uncertain because we do not know the precise reservoir age in the past. We use a reservoir age of 400 years, which is based on dating of museum specimens collected live before testing of nuclear bombs. It appears from the ages that the Great Belt (Storebælt) was inundated before The Sound (Øresund). The oldest ages on marine shells from the northern part of the Great Belt region are about 8.9 cal. ka BP. From the central part of the Great Belt, the oldest ages are about 8.2 cal. ka BP, in Mecklenburg Bay 8.1 cal. ka BP and in the Arkona Basin 7.1 cal. ka BP. Sediments deposited prior to the occurrence of marine molluscs contain brackish-water ostracods (Cyprideis torosa and Cytheromorpha fuscata); the sediments are usually laminated and non-bioturbated mud. The brackish-water phase may have lasted 500–1000 years. The youngest lake deposits without signs of marine influence are dated to c. 8.8 cal. ka BP (central Great Belt), 8.7 cal. ka BP (Little Belt) and 8.5 cal. ka BP (Arkona Basin). We see no evidence for marine influence at c. 10 cal. ka BP as recorded by some studies from the Baltic Basin.

OriginalsprogEngelsk
TidsskriftBoreas
Vol/bind50
Nummer4
Sider (fra-til)1079-1094
Antal sider16
ISSN0300-9483
DOI
StatusUdgivet - 25 okt. 2021

Bibliografisk note

Funding Information:
We dedicate this paper to our friend Wolfram Lemke from the Institute for Baltic Sea Research in Warnemünde. Wolfram passed away prematurely at the age of 50 in April 2005. He invited OB and JBJ on many cruises on board the research vessel and he contributed significantly to the study of the history of the southwestern Baltic Sea. Geocenter Denmark provided financial support. MSS furthermore received funding from the Danish Council for Independent Research (grant no. 7014‐ 00113B/FNU; G‐Ice project) and from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 869383 (ECOTIP). We are grateful to journal referees Svante Björck and John England for their positive, constructive and thorough reviews of the manuscript. Jan A. Piotrowski is thanked for editorial comments that helped to improve the paper. Alexander von Humboldt

Publisher Copyright:
© 2021 Collegium Boreas. Published by John Wiley & Sons Ltd

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

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