Early Holocene sea-level changes in Øresund, southern Scandinavia

Authors

  • Ole Bennike Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen K. Denmark
  • Martin Skov Andreasen Department of Geography and Geology, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark
  • Jørn Bo Jensen Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen K. Denmark
  • Matthias Moros The Leibniz Institute for Baltic Sea Research, Seestrasse 15, Warnemünde, D-18119 Rostock , Germany
  • Nanna Noe-Nygaard Department of Geography and Geology, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark

DOI:

https://doi.org/10.34194/geusb.v26.4744

Abstract

The Baltic Sea and Kattegat are connected via three straits: Storebælt, Lillebælt and Øresund (Fig. 1). Øresund is the shallowest with a threshold around 7 m deep and increasing water depths to the north (Fig. 2). In the early Holocene, global sea-level rise led to reflooding of Øresund. It started in northern Øresund which was transformed into a fjord. However, so far the timing of the transgression has not been well determined, but sediment cores collected north of the threshold, at water depths of 12 to 20 m, and a new series of radiocarbon ages help to constrain this. As the relative sea level continued to rise, the threshold in Øresund was also flooded, and Øresund became a strait. In mid-Holocene time, the relative sea level rose until it was 4–5 m higher than at present, and low-lying areas around Øresund became small fjords. During the late Holocene, the relative sea level fell again. Part of the data set discussed here was presented by Andreasen (2005).

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Published

2012-07-10

How to Cite

Bennike, O., Skov Andreasen, M., Jensen, J. B., Moros, M., & Noe-Nygaard, N. (2012). Early Holocene sea-level changes in Øresund, southern Scandinavia. GEUS Bulletin, 26, 29–32. https://doi.org/10.34194/geusb.v26.4744

Issue

Section

RESEARCH ARTICLE | SHORT

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