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Holocene relative shore-level changes and development of the Ģipka lagoon in the western Gulf of Riga

Rosentau, Alar ; Grudzinska, Ieva ; Kalińska, Edyta LU ; Alexanderson, Helena LU ; Bērziņš, Valdis ; Ceriņa, Aija ; Kalniņa, Laimdota ; Karušs, Jānis ; Lamsters, Kristaps and Muru, Merle , et al. (2023) In Boreas 52(4). p.517-537
Abstract

Holocene relative shore-level changes and development of the Ģipka palaeolagoon in the western Gulf of Riga are reconstructed using multiproxy analyses by combining litho-, biostratigraphical and chronological data with remote sensing and geophysical data. The results show the development of the Ģipka basin from the Ancylus Lake/Initial Litorina Sea coastal zone (before c. 9.1 cal. ka BP) to coastal fen (c. 9.1 to 8.4 cal. ka BP) and gradual development of the Litorina Sea lagoon (c. 8.4 to 4.8 cal. ka BP) and its transition to a freshwater coastal lake (c. 4.8 to 4.6 cal. ka BP), fen (c. 4.6 to 4.2 cal. ka BP), and river floodplain (since c. 4.2 cal. ka BP). The highest shorelines of the Ancylus Lake and Litorina Sea were mapped at an... (More)

Holocene relative shore-level changes and development of the Ģipka palaeolagoon in the western Gulf of Riga are reconstructed using multiproxy analyses by combining litho-, biostratigraphical and chronological data with remote sensing and geophysical data. The results show the development of the Ģipka basin from the Ancylus Lake/Initial Litorina Sea coastal zone (before c. 9.1 cal. ka BP) to coastal fen (c. 9.1 to 8.4 cal. ka BP) and gradual development of the Litorina Sea lagoon (c. 8.4 to 4.8 cal. ka BP) and its transition to a freshwater coastal lake (c. 4.8 to 4.6 cal. ka BP), fen (c. 4.6 to 4.2 cal. ka BP), and river floodplain (since c. 4.2 cal. ka BP). The highest shorelines of the Ancylus Lake and Litorina Sea were mapped at an elevation of 12–11 and 9 m a.s.l., respectively. A new relative shore level (RSL) curve for the western Gulf of Riga was constructed based on RSL data from the Ģipka area and from nearby Ruhnu Island studied earlier. The reconstruction shows that the beginning of the last marine transgression in the western Gulf of Riga started at c. 8.4 cal. ka BP, and concurred with the 1.9 m RSL rise event recorded from the North Sea basin. Diatom analysis results indicate the existence of the Ģipka lagoon between c. 7.7 and 4.8 cal. ka BP, with the highest salinity c. 6.1 cal. ka BP. During the existence of the brackish lagoon, settlement sites of the Neolithic hunter–gatherer groups existed on the shores of the lagoon in the period c. 6.0 to 5.0 cal. ka BP.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Boreas
volume
52
issue
4
pages
517 - 537
publisher
John Wiley & Sons Inc.
external identifiers
  • scopus:85164750124
ISSN
0300-9483
DOI
10.1111/bor.12628
language
English
LU publication?
yes
id
b3b06fd2-dd4c-47c6-a040-73cdb97a5724
date added to LUP
2023-09-27 10:54:30
date last changed
2024-01-09 15:46:10
@article{b3b06fd2-dd4c-47c6-a040-73cdb97a5724,
  abstract     = {{<p>Holocene relative shore-level changes and development of the Ģipka palaeolagoon in the western Gulf of Riga are reconstructed using multiproxy analyses by combining litho-, biostratigraphical and chronological data with remote sensing and geophysical data. The results show the development of the Ģipka basin from the Ancylus Lake/Initial Litorina Sea coastal zone (before c. 9.1 cal. ka BP) to coastal fen (c. 9.1 to 8.4 cal. ka BP) and gradual development of the Litorina Sea lagoon (c. 8.4 to 4.8 cal. ka BP) and its transition to a freshwater coastal lake (c. 4.8 to 4.6 cal. ka BP), fen (c. 4.6 to 4.2 cal. ka BP), and river floodplain (since c. 4.2 cal. ka BP). The highest shorelines of the Ancylus Lake and Litorina Sea were mapped at an elevation of 12–11 and 9 m a.s.l., respectively. A new relative shore level (RSL) curve for the western Gulf of Riga was constructed based on RSL data from the Ģipka area and from nearby Ruhnu Island studied earlier. The reconstruction shows that the beginning of the last marine transgression in the western Gulf of Riga started at c. 8.4 cal. ka BP, and concurred with the 1.9 m RSL rise event recorded from the North Sea basin. Diatom analysis results indicate the existence of the Ģipka lagoon between c. 7.7 and 4.8 cal. ka BP, with the highest salinity c. 6.1 cal. ka BP. During the existence of the brackish lagoon, settlement sites of the Neolithic hunter–gatherer groups existed on the shores of the lagoon in the period c. 6.0 to 5.0 cal. ka BP.</p>}},
  author       = {{Rosentau, Alar and Grudzinska, Ieva and Kalińska, Edyta and Alexanderson, Helena and Bērziņš, Valdis and Ceriņa, Aija and Kalniņa, Laimdota and Karušs, Jānis and Lamsters, Kristaps and Muru, Merle and Nartišs, Māris and Paparde, Līga and Hang, Tiit}},
  issn         = {{0300-9483}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{517--537}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Boreas}},
  title        = {{Holocene relative shore-level changes and development of the Ģipka lagoon in the western Gulf of Riga}},
  url          = {{http://dx.doi.org/10.1111/bor.12628}},
  doi          = {{10.1111/bor.12628}},
  volume       = {{52}},
  year         = {{2023}},
}