Late Quaternary history of Lammefjorden, north-west Sjælland, Denmark

Lammefjorden is a reclaimed fjord in north-west Sjælland, Denmark. Sediment cores from the area were collected to study its development after the last deglaciation, in particular the sea-level history. Late glacial and Early Holocene lake and bog deposits occur below marine deposits. Sparse late gla...

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Bibliographic Details
Published in:GEUS Bulletin 2020-01, Vol.44, p.1-6
Main Authors: Bennike, Ole, Roll Jakobsen, Peter, Walløe Hansen, Jakob
Format: Article
Language:English
Subjects:
Archaeology
Deglaciation
Fjords
Flora
Holocene
lammefjorden
late glacial
macrofossils
Pine trees
Quaternary
Sea level
Sedimentation & deposition
Sedimentation rates
Sediments
sjælland
Tidal currents
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Summary:Lammefjorden is a reclaimed fjord in north-west Sjælland, Denmark. Sediment cores from the area were collected to study its development after the last deglaciation, in particular the sea-level history. Late glacial and Early Holocene lake and bog deposits occur below marine deposits. Sparse late glacial fossil assemblages indicate tree-less environments with dwarf-shrub heaths. Early Holocene deposits contain remains of Betula sec. Albae sp. and Pinus sylvestris, which indicate open forests. The wetland flora comprised the calciphilous reed plant Cladium mariscus and the water plant Najas marina. Marine gyttja from basins is characterised by sparse benthic faunas, probably due to high sedimentation rates. In some areas, shell-rich deposits were found, with large shells of Ostrea edulis, indicative of high summer temperatures, high salinity and strong tidal currents. A marine shell dated to 6.7 cal. ka provides a minimum age for the marine transgression of Lammefjorden.
ISSN:2597-2162
2597-2154
DOI:10.34194/geusb.v44.4630