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Seismic stratigraphy of Late Quaternary deposits in the eastern Skagerrak

Journal article
Authors Olof Larsson
Rodney Stevens
Published in Marine and Petroleum Geology
Volume 25
Issue 10
Pages 1023-1039
ISSN 02648172
Publication year 2008
Published at Department of Earth Sciences
Pages 1023-1039
Language en
Keywords Skagerrak, sedimentology, seismic stratigraphy, marine geology, sequence stratigraphy, sediment transport
Subject categories Quaternary geology, Sedimentology


High resolution seismic profiles from the Swedish west coast have been used in this study. The Quaternary deposits have been divided into six seismic sequences, containing together thirteen different seismic facies. Documentation of these sequences and facies, their stratigraphic and geographic variability is the first step in a basin-fill analysis aiming at interpreting the depositional environments and the major controlling processes. The deposits are interpreted to consist of one deglaciation cycle. The sequences are; I) bedrock, II) coarse glacial deposits, III) Weichselian glaciomarine ice-proximal deposits, IV) Weichselian glaciomarine ice-distal deposits, V) channel fill deposits, VI) Holocene marine deposits. The major part of the sediment package is the Weichselian glaciomarine ice-proximal deposits, deposited during the ice recession period, close to or adjacent to the retreating ice. Typical for these deposits are conformably, well stratified deposits with high amplitude. The second large part is the Holocene marine deposits, these are mainly found in the southern part. They have typically a near transparent seismic configuration with only weak parallel stratification. These two major sequences are separated by a regional unconformity, creating a hiatus of at least 6000 year.

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