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MIS 3 marine and lacustrine sediments at Kriegers Flak, southwestern Baltic Sea

Anjar, Johanna LU ; Larsen, Nicolaj Krog LU ; Björck, Svante LU ; Adrielsson, Lena LU and Filipsson, Helena LU (2010) In Boreas 39(2). p.360-366
Abstract
Sediment cores from the Kriegers Flak area in the southwestern Baltic Sea show a distinct lithological succession, starting with a lower diamict that is overlain by a c. 10 m thick clay unit that contains peat, gyttja and other organic remains. On top follows an upper diamict that is inter-layered with sorted sediments and overlain by an upward-coarsening sequence with molluscs. In this paper we focus on the clay unit, which has been subdivided into three subunits: (A) lower clay with benthic foraminifera and with diamict beds in the lower part; (B) thin beds of gyttja and peat, which have been radiocarbon-dated to 31-35 14C kyr BP (c. 36-41 cal. kyr BP); and (C) upper clay unit. Based on the preliminary results we suggest the following... (More)
Sediment cores from the Kriegers Flak area in the southwestern Baltic Sea show a distinct lithological succession, starting with a lower diamict that is overlain by a c. 10 m thick clay unit that contains peat, gyttja and other organic remains. On top follows an upper diamict that is inter-layered with sorted sediments and overlain by an upward-coarsening sequence with molluscs. In this paper we focus on the clay unit, which has been subdivided into three subunits: (A) lower clay with benthic foraminifera and with diamict beds in the lower part; (B) thin beds of gyttja and peat, which have been radiocarbon-dated to 31-35 14C kyr BP (c. 36-41 cal. kyr BP); and (C) upper clay unit. Based on the preliminary results we suggest the following depositional model: fine-grained sediments interbedded with diamict in the lower part (subunit A) were deposited in a brackish basin during a retreat of the Scandinavian Ice Sheet, probably during the Middle Weichselian. Around 40 kyr BP the area turned into a wetland with small ponds (subunit B). A transgression, possibly caused by the damming of the Baltic Basin during the Kattegat advance at 29 kyr BP, led to the deposition of massive clay (subunit C). The data presented here provide new information about the paleoenvironmental changes occurring in the Baltic Basin following the Middle Weichselian glaciation. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Boreas
volume
39
issue
2
pages
360 - 366
publisher
Taylor & Francis
external identifiers
  • wos:000274953600015
  • scopus:77953891231
ISSN
1502-3885
DOI
10.1111/j.1502-3885.2010.00139.x
project
MERGE
language
English
LU publication?
yes
id
e99e7ab2-2c13-4214-a2e8-a9c52222eaa3 (old id 1568325)
date added to LUP
2010-03-23 13:25:30
date last changed
2018-05-29 10:15:52
@article{e99e7ab2-2c13-4214-a2e8-a9c52222eaa3,
  abstract     = {Sediment cores from the Kriegers Flak area in the southwestern Baltic Sea show a distinct lithological succession, starting with a lower diamict that is overlain by a c. 10 m thick clay unit that contains peat, gyttja and other organic remains. On top follows an upper diamict that is inter-layered with sorted sediments and overlain by an upward-coarsening sequence with molluscs. In this paper we focus on the clay unit, which has been subdivided into three subunits: (A) lower clay with benthic foraminifera and with diamict beds in the lower part; (B) thin beds of gyttja and peat, which have been radiocarbon-dated to 31-35 14C kyr BP (c. 36-41 cal. kyr BP); and (C) upper clay unit. Based on the preliminary results we suggest the following depositional model: fine-grained sediments interbedded with diamict in the lower part (subunit A) were deposited in a brackish basin during a retreat of the Scandinavian Ice Sheet, probably during the Middle Weichselian. Around 40 kyr BP the area turned into a wetland with small ponds (subunit B). A transgression, possibly caused by the damming of the Baltic Basin during the Kattegat advance at 29 kyr BP, led to the deposition of massive clay (subunit C). The data presented here provide new information about the paleoenvironmental changes occurring in the Baltic Basin following the Middle Weichselian glaciation.},
  author       = {Anjar, Johanna and Larsen, Nicolaj Krog and Björck, Svante and Adrielsson, Lena and Filipsson, Helena},
  issn         = {1502-3885},
  language     = {eng},
  number       = {2},
  pages        = {360--366},
  publisher    = {Taylor & Francis},
  series       = {Boreas},
  title        = {MIS 3 marine and lacustrine sediments at Kriegers Flak, southwestern Baltic Sea},
  url          = {http://dx.doi.org/10.1111/j.1502-3885.2010.00139.x},
  volume       = {39},
  year         = {2010},
}