Early Holocene drowned lagoonal deposits from the Kattegat, southern Scandinavia

Ole Bennike, Jørn Bo Jensen, Peter B. Konradi, Wolfram Lemke, Jan Heinemeier

Research output: Contribution to journalArticleResearchpeer-review

35 Citations (Scopus)

Abstract

Shallow seismic profiling indicated the presence of a drowned lagoon-barrier system formed during the transgression of the southern Kattegat, and investigations of core material have confirmed this. Studies of plant and animal macrofossils show that the lagoonal sediments contain a mixture of marine, brackish, lacustrine, telmatic and terrestrial taxa, and analyses of foraminifers indicate brackish-water conditions. Low oxygen isotope values obtained on shells of marine molluscs also point to lowered salinity. The lagoonal sediments are situated at depths between 24 and 35 m below present sea level. They are dated to between c. 10.5 cal. ka BP and c. 9.5 cal. ka BP, and reflect a period characterized by a moderate relative sea level rise. The lagoonal sediments are underlain by lateglacial glaciomarine clay and silt, which are separated from the Holocene deposits by an unconformity. The earliest Holocene sediments consist of littoral sand with gravel, stones and shells; these sediments were formed during the transgression of the area before the barrier island-lagoon system was developed. The lagoonal sediments are overlain by mud, which contains animal remains that indicate increasing water depths.

Original languageEnglish
Pages (from-to)272-286
Number of pages15
JournalBoreas
Volume29
Issue number4
DOIs
Publication statusPublished - Nov 2000

Programme Area

  • Programme Area 5: Nature and Climate

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