Holocene shore displacement and deglaciation chronology in Norrbotten, Sweden
Lindén, Mattias LU ; Möller, Per LU
; Björck, Svante
LU
and Sandgren, Per
LU
(2006)
In Boreas
35(1).
p.1-22
- Abstract
- The coastal zone of Norrbotten, northern Sweden, was gradually inundated by the Ancylus Lake following the retreating ice margin and forming a highest coastline approximately 210 m above the present sea level. The succeeding shore displacement is reconstructed based on lithological investigations and radiocarbon datings of identified isolation sequences from 12 cored lake basins. The highest lake basins, along with two basins above the highest shoreline, suggest ice-free conditions already at 10 500 cal. yr BP. This is at least 500 years earlier than previously thought and implies rapid ice-sheet break-up in the Gulf of Bothnia. The shore displacement (RSL) curve represents a forced regression of successively decreasing rate through the... (More)
- The coastal zone of Norrbotten, northern Sweden, was gradually inundated by the Ancylus Lake following the retreating ice margin and forming a highest coastline approximately 210 m above the present sea level. The succeeding shore displacement is reconstructed based on lithological investigations and radiocarbon datings of identified isolation sequences from 12 cored lake basins. The highest lake basins, along with two basins above the highest shoreline, suggest ice-free conditions already at 10 500 cal. yr BP. This is at least 500 years earlier than previously thought and implies rapid ice-sheet break-up in the Gulf of Bothnia. The shore displacement (RSL) curve represents a forced regression of successively decreasing rate through the Holocene, from 9 m/100 yr to 0.8 m/100 yr. During the first 1000-1200 years, the isostatic uplift is exponentially declining, followed by a constant uplift rate from c. 9500 cal. yr BP to 5500-5000 cal. yr BP. The last 5000 years seem to be characterized by a low but constant rebound rate. The development of the Ancylus Lake stage of the Baltic may also be discerned in the Norrbotten RSL curve, suggesting that the chronology of the Ancylus Lake stages may have to be revised. The Littorina transgression is also reflected by the RSL curve shape. In addition, a series of early to mid-Holocene beach terraces were OSL-dated to allow for comparison with the C-14-dated shore displacement curve. Interpretations of these ages and their relation to former sea levels were clearly more problematic than the dating of the lake basin isolations. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/419523
- author
- Lindén, Mattias
LU
; Möller, Per
LU
; Björck, Svante
LU
and Sandgren, Per
LU
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Boreas
- volume
- 35
- issue
- 1
- pages
- 1 - 22
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- wos:000234922300001
- scopus:32144450316
- ISSN
- 1502-3885
- DOI
- 10.1080/03009480500359160
- language
- English
- LU publication?
- yes
- id
- 59bf7de1-7c79-4c58-b1e3-f07fafde9822 (old id 419523)
- date added to LUP
- 2016-04-01 12:01:45
- date last changed
- 2022-03-20 22:22:57
@article{59bf7de1-7c79-4c58-b1e3-f07fafde9822,
abstract = {{The coastal zone of Norrbotten, northern Sweden, was gradually inundated by the Ancylus Lake following the retreating ice margin and forming a highest coastline approximately 210 m above the present sea level. The succeeding shore displacement is reconstructed based on lithological investigations and radiocarbon datings of identified isolation sequences from 12 cored lake basins. The highest lake basins, along with two basins above the highest shoreline, suggest ice-free conditions already at 10 500 cal. yr BP. This is at least 500 years earlier than previously thought and implies rapid ice-sheet break-up in the Gulf of Bothnia. The shore displacement (RSL) curve represents a forced regression of successively decreasing rate through the Holocene, from 9 m/100 yr to 0.8 m/100 yr. During the first 1000-1200 years, the isostatic uplift is exponentially declining, followed by a constant uplift rate from c. 9500 cal. yr BP to 5500-5000 cal. yr BP. The last 5000 years seem to be characterized by a low but constant rebound rate. The development of the Ancylus Lake stage of the Baltic may also be discerned in the Norrbotten RSL curve, suggesting that the chronology of the Ancylus Lake stages may have to be revised. The Littorina transgression is also reflected by the RSL curve shape. In addition, a series of early to mid-Holocene beach terraces were OSL-dated to allow for comparison with the C-14-dated shore displacement curve. Interpretations of these ages and their relation to former sea levels were clearly more problematic than the dating of the lake basin isolations.}},
author = {{Lindén, Mattias and Möller, Per and Björck, Svante and Sandgren, Per}},
issn = {{1502-3885}},
language = {{eng}},
number = {{1}},
pages = {{1--22}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Boreas}},
title = {{Holocene shore displacement and deglaciation chronology in Norrbotten, Sweden}},
url = {{http://dx.doi.org/10.1080/03009480500359160}},
doi = {{10.1080/03009480500359160}},
volume = {{35}},
year = {{2006}},
}