Advanced

New insights on the Yoldia Sea low stand in the Blekinge archipelago, southern Baltic Sea

Andrén, Thomas; Andrén, Elinor; Berglund, Björn LU and Yu, Shi-Young (2007) In GFF 129. p.277-285
Abstract (Swedish)
Abstract in Undetermined

One sediment core from the Jarnavik bay in Blekinge archipelago has been investigated for its content of pollen and diatoms and its chemical properties. Two levels were also dated by radiocarbon. Based on the results the sediment sequence analysed has been divided into three environmental units largely corresponding to the lithology of the sequence. A lowermost unit consisting of weakly varved and homogeneous clay was deposited during the end of the brackish phase of the Yoldia Sea at a moderate water depth. On top of this unit a gyttja-clay unit was deposited. The onset of the deposition of this unit has been dated to c. 11 100 cal. yrs. BP. An increasing organic production and increased... (More)
Abstract in Undetermined

One sediment core from the Jarnavik bay in Blekinge archipelago has been investigated for its content of pollen and diatoms and its chemical properties. Two levels were also dated by radiocarbon. Based on the results the sediment sequence analysed has been divided into three environmental units largely corresponding to the lithology of the sequence. A lowermost unit consisting of weakly varved and homogeneous clay was deposited during the end of the brackish phase of the Yoldia Sea at a moderate water depth. On top of this unit a gyttja-clay unit was deposited. The onset of the deposition of this unit has been dated to c. 11 100 cal. yrs. BP. An increasing organic production and increased terrestrial influence is recorded in the chemical data and a very shallow water depth is indicated in the pollen and diatom flora. These results point to conditions in a bay probably isolated from the Yoldia Sea. A local tentative shore displacement curve have been constructed and it is proposed that this unit represents the low stand at c. -18 m during the Yoldia Sea stage in this part of the Baltic Sea basin. The uppermost unit consists of homogeneous clay with a low content of organic carbon. An increasing water depth is indicated by the composition of both pollen and diatoms. The diatom flora also displays an increase in freshwater species. This environmental change was probably the result of a transgression in the beginning of the Ancylus Lake stage. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Baltic Sea, Blekinge archipelago, pollen, diatoms, submarine pine stumps, Yoldia Sea, Yoldia regression, Ancylus Lake, Ancylus transgression, local Blekinge shore displacement curve
in
GFF
volume
129
pages
277 - 285
publisher
Geological Society of Sweden
external identifiers
  • wos:000252804100002
  • scopus:38949107607
ISSN
2000-0863
language
English
LU publication?
yes
id
6b27cc7c-28c5-4a57-acd6-c070641641af (old id 634605)
date added to LUP
2007-12-13 11:17:42
date last changed
2017-01-01 04:46:20
@article{6b27cc7c-28c5-4a57-acd6-c070641641af,
  abstract     = {<b>Abstract in Undetermined</b><br/><br>
One sediment core from the Jarnavik bay in Blekinge archipelago has been investigated for its content of pollen and diatoms and its chemical properties. Two levels were also dated by radiocarbon. Based on the results the sediment sequence analysed has been divided into three environmental units largely corresponding to the lithology of the sequence. A lowermost unit consisting of weakly varved and homogeneous clay was deposited during the end of the brackish phase of the Yoldia Sea at a moderate water depth. On top of this unit a gyttja-clay unit was deposited. The onset of the deposition of this unit has been dated to c. 11 100 cal. yrs. BP. An increasing organic production and increased terrestrial influence is recorded in the chemical data and a very shallow water depth is indicated in the pollen and diatom flora. These results point to conditions in a bay probably isolated from the Yoldia Sea. A local tentative shore displacement curve have been constructed and it is proposed that this unit represents the low stand at c. -18 m during the Yoldia Sea stage in this part of the Baltic Sea basin. The uppermost unit consists of homogeneous clay with a low content of organic carbon. An increasing water depth is indicated by the composition of both pollen and diatoms. The diatom flora also displays an increase in freshwater species. This environmental change was probably the result of a transgression in the beginning of the Ancylus Lake stage.},
  author       = {Andrén, Thomas and Andrén, Elinor and Berglund, Björn and Yu, Shi-Young},
  issn         = {2000-0863},
  keyword      = {Baltic Sea,Blekinge archipelago,pollen,diatoms,submarine pine stumps,Yoldia Sea,Yoldia regression,Ancylus Lake,Ancylus transgression,local Blekinge shore displacement curve},
  language     = {eng},
  pages        = {277--285},
  publisher    = {Geological Society of Sweden},
  series       = {GFF},
  title        = {New insights on the Yoldia Sea low stand in the Blekinge archipelago, southern Baltic Sea},
  volume       = {129},
  year         = {2007},
}