Continuous record of Holocene sea-level changes and coastal development of the Kattegat island Laeso (4900 years BP to present)

Research output: Contribution to journalJournal articleResearchpeer-review

Standard

Continuous record of Holocene sea-level changes and coastal development of the Kattegat island Laeso (4900 years BP to present). / Hansen, Jens Morten; Aagaard, Troels; Stockmarr, Jens; Moller, Ingelise; Nielsen, Lars; Binderup, Merete; Larsen, Jan Hammer; Larsen, Birger.

In: Geological Society of Denmark. Bulletin, Vol. 64, 2016, p. 1-55.

Research output: Contribution to journalJournal articleResearchpeer-review

Harvard

Hansen, JM, Aagaard, T, Stockmarr, J, Moller, I, Nielsen, L, Binderup, M, Larsen, JH & Larsen, B 2016, 'Continuous record of Holocene sea-level changes and coastal development of the Kattegat island Laeso (4900 years BP to present)', Geological Society of Denmark. Bulletin, vol. 64, pp. 1-55.

APA

Hansen, J. M., Aagaard, T., Stockmarr, J., Moller, I., Nielsen, L., Binderup, M., ... Larsen, B. (2016). Continuous record of Holocene sea-level changes and coastal development of the Kattegat island Laeso (4900 years BP to present). Geological Society of Denmark. Bulletin, 64, 1-55.

Vancouver

Hansen JM, Aagaard T, Stockmarr J, Moller I, Nielsen L, Binderup M et al. Continuous record of Holocene sea-level changes and coastal development of the Kattegat island Laeso (4900 years BP to present). Geological Society of Denmark. Bulletin. 2016;64:1-55.

Author

Hansen, Jens Morten ; Aagaard, Troels ; Stockmarr, Jens ; Moller, Ingelise ; Nielsen, Lars ; Binderup, Merete ; Larsen, Jan Hammer ; Larsen, Birger. / Continuous record of Holocene sea-level changes and coastal development of the Kattegat island Laeso (4900 years BP to present). In: Geological Society of Denmark. Bulletin. 2016 ; Vol. 64. pp. 1-55.

Bibtex

@article{38b5a318a48a4cdbbbd8c58be7c9d6fa,
title = "Continuous record of Holocene sea-level changes and coastal development of the Kattegat island Laeso (4900 years BP to present)",
abstract = "L{\ae}s{\o} is the largest island of the Kattegat–Skagerrak region and exposes a vast array of relative sealevel(RSL) indicators, mainly raised beach ridges, swales, lagoons and saltmarshes. The physicalenvironment of continuous glacial rebound, excessive supply of sediment, shallow surroundingwaters, low amplitudes of near-shore waves, and micro-tidal conditions produced numerous sealevelproxies of both barrier coasts and saltmarshes. About 1200 RSL/age index points reflect notonly short-term sea-level highstands as in most other parts of Europe, but also short-term sea-levellowstands, which in less regressive environments have normally been removed by coastal erosionor obscured by berms from subsequent highstands. Based on a high-precision lidar digital terrainmodel, the beach ridges have been mapped, typified, levelled and correlated relative to their orderof appearance. Transformation of this relative chronology to a robust absolute age model of the RSLchanges has been made on the basis of 119 optically stimulated luminescence (OSL) datings, 14Cdatings, and tree-ring datings. By ground penetrating radar (GPR) and terrain analyses, the heightof the swash zone (run-up) has been determined in order to transform the ridge elevations to adetailed curve of the RSL/age relation. The curve reveals eight centennial sea-level oscillations of0.5–1.1 m superimposed on the general trend of the RSL curve, including a Little Ice Age lowstandof 0.6 m at 1300 AD. The island grew from now eroded landscapes of Weichselian glacio-marinedeposits, including the oldest known post-Weichselian forested area in Scandinavia. During thelast 4900 years new coastal landscapes have formed continuously, resulting in around 4000 km ofstill visible, raised palaeo-shorelines in mostly uncultivated landscapes. After formation of theoldest preserved beach-ridge complex, numerous sea-level proxies formed in a strongly regressiveenvironment caused by glacial rebound supplemented with local uplift due to extensive erosionduring Boreal and Atlantic time of the 1700 km2 glacio-marine platform upon which the island isstill being built. The combined uplift produced a relative sea-level fall of 10.3 m, corresponding toa mean vertical regression rate of 2.1 mm/year and a mean horizontal regression rate of 2 m/year,and formed eight distinct types of raised coastal landscapes where well separated beach ridges andsaltmarshes developed continuously.The oldest preserved part of L{\ae}s{\o} appeared 4900 years BP as the eastern tip of a 10 km longbarrier-spit system growing from a raised glacio-marine landscape, now represented only byboulder reefs west and north-west of the present island. Around 4000 years BP another barrier-spitsystem appeared to the south, growing northwards from another raised glacio-marine landscapeat the raised boulder reefs in the town of Byrum and the abrasion landscapes of R{\o}nnerne. Around3000 years BP these two inital barrier-spit systems united and formed one major barrier betweenthe present towns Vester{\o} and Byrum. To the north-east, a third glacio-marine landscape providedmaterials for the development of the eastern end of the island. Thus, around 2500 BP the island hadbecome one triangular, completely detached island (’the old triangle’) between Vester{\o}, Byrum andBansten Bakke. From this detached stage, nine subsequent barrier-spit systems grew to the east andformed the present {\O}sterby peninsula, while a series of nine barrier-island complexes developedsouth-west of ’the old triangle’. To the south and south-east, low-energy coasts developed and formedlow beach ridges and saltmarsh landscapes",
keywords = "Laeso, Holocene, beach ridge, relative sea-level curve, isostatic rebound, Lidar DTM, optically stimulated luminescence (OSL) dating",
author = "Hansen, {Jens Morten} and Troels Aagaard and Jens Stockmarr and Ingelise Moller and Lars Nielsen and Merete Binderup and Larsen, {Jan Hammer} and Birger Larsen",
year = "2016",
language = "English",
volume = "64",
pages = "1--55",
journal = "Bulletin of the Geological Society of Denmark",
issn = "0011-6297",
publisher = "Dansk Geologisk Forening",

}

RIS

TY - JOUR

T1 - Continuous record of Holocene sea-level changes and coastal development of the Kattegat island Laeso (4900 years BP to present)

AU - Hansen, Jens Morten

AU - Aagaard, Troels

AU - Stockmarr, Jens

AU - Moller, Ingelise

AU - Nielsen, Lars

AU - Binderup, Merete

AU - Larsen, Jan Hammer

AU - Larsen, Birger

PY - 2016

Y1 - 2016

N2 - Læsø is the largest island of the Kattegat–Skagerrak region and exposes a vast array of relative sealevel(RSL) indicators, mainly raised beach ridges, swales, lagoons and saltmarshes. The physicalenvironment of continuous glacial rebound, excessive supply of sediment, shallow surroundingwaters, low amplitudes of near-shore waves, and micro-tidal conditions produced numerous sealevelproxies of both barrier coasts and saltmarshes. About 1200 RSL/age index points reflect notonly short-term sea-level highstands as in most other parts of Europe, but also short-term sea-levellowstands, which in less regressive environments have normally been removed by coastal erosionor obscured by berms from subsequent highstands. Based on a high-precision lidar digital terrainmodel, the beach ridges have been mapped, typified, levelled and correlated relative to their orderof appearance. Transformation of this relative chronology to a robust absolute age model of the RSLchanges has been made on the basis of 119 optically stimulated luminescence (OSL) datings, 14Cdatings, and tree-ring datings. By ground penetrating radar (GPR) and terrain analyses, the heightof the swash zone (run-up) has been determined in order to transform the ridge elevations to adetailed curve of the RSL/age relation. The curve reveals eight centennial sea-level oscillations of0.5–1.1 m superimposed on the general trend of the RSL curve, including a Little Ice Age lowstandof 0.6 m at 1300 AD. The island grew from now eroded landscapes of Weichselian glacio-marinedeposits, including the oldest known post-Weichselian forested area in Scandinavia. During thelast 4900 years new coastal landscapes have formed continuously, resulting in around 4000 km ofstill visible, raised palaeo-shorelines in mostly uncultivated landscapes. After formation of theoldest preserved beach-ridge complex, numerous sea-level proxies formed in a strongly regressiveenvironment caused by glacial rebound supplemented with local uplift due to extensive erosionduring Boreal and Atlantic time of the 1700 km2 glacio-marine platform upon which the island isstill being built. The combined uplift produced a relative sea-level fall of 10.3 m, corresponding toa mean vertical regression rate of 2.1 mm/year and a mean horizontal regression rate of 2 m/year,and formed eight distinct types of raised coastal landscapes where well separated beach ridges andsaltmarshes developed continuously.The oldest preserved part of Læsø appeared 4900 years BP as the eastern tip of a 10 km longbarrier-spit system growing from a raised glacio-marine landscape, now represented only byboulder reefs west and north-west of the present island. Around 4000 years BP another barrier-spitsystem appeared to the south, growing northwards from another raised glacio-marine landscapeat the raised boulder reefs in the town of Byrum and the abrasion landscapes of Rønnerne. Around3000 years BP these two inital barrier-spit systems united and formed one major barrier betweenthe present towns Vesterø and Byrum. To the north-east, a third glacio-marine landscape providedmaterials for the development of the eastern end of the island. Thus, around 2500 BP the island hadbecome one triangular, completely detached island (’the old triangle’) between Vesterø, Byrum andBansten Bakke. From this detached stage, nine subsequent barrier-spit systems grew to the east andformed the present Østerby peninsula, while a series of nine barrier-island complexes developedsouth-west of ’the old triangle’. To the south and south-east, low-energy coasts developed and formedlow beach ridges and saltmarsh landscapes

AB - Læsø is the largest island of the Kattegat–Skagerrak region and exposes a vast array of relative sealevel(RSL) indicators, mainly raised beach ridges, swales, lagoons and saltmarshes. The physicalenvironment of continuous glacial rebound, excessive supply of sediment, shallow surroundingwaters, low amplitudes of near-shore waves, and micro-tidal conditions produced numerous sealevelproxies of both barrier coasts and saltmarshes. About 1200 RSL/age index points reflect notonly short-term sea-level highstands as in most other parts of Europe, but also short-term sea-levellowstands, which in less regressive environments have normally been removed by coastal erosionor obscured by berms from subsequent highstands. Based on a high-precision lidar digital terrainmodel, the beach ridges have been mapped, typified, levelled and correlated relative to their orderof appearance. Transformation of this relative chronology to a robust absolute age model of the RSLchanges has been made on the basis of 119 optically stimulated luminescence (OSL) datings, 14Cdatings, and tree-ring datings. By ground penetrating radar (GPR) and terrain analyses, the heightof the swash zone (run-up) has been determined in order to transform the ridge elevations to adetailed curve of the RSL/age relation. The curve reveals eight centennial sea-level oscillations of0.5–1.1 m superimposed on the general trend of the RSL curve, including a Little Ice Age lowstandof 0.6 m at 1300 AD. The island grew from now eroded landscapes of Weichselian glacio-marinedeposits, including the oldest known post-Weichselian forested area in Scandinavia. During thelast 4900 years new coastal landscapes have formed continuously, resulting in around 4000 km ofstill visible, raised palaeo-shorelines in mostly uncultivated landscapes. After formation of theoldest preserved beach-ridge complex, numerous sea-level proxies formed in a strongly regressiveenvironment caused by glacial rebound supplemented with local uplift due to extensive erosionduring Boreal and Atlantic time of the 1700 km2 glacio-marine platform upon which the island isstill being built. The combined uplift produced a relative sea-level fall of 10.3 m, corresponding toa mean vertical regression rate of 2.1 mm/year and a mean horizontal regression rate of 2 m/year,and formed eight distinct types of raised coastal landscapes where well separated beach ridges andsaltmarshes developed continuously.The oldest preserved part of Læsø appeared 4900 years BP as the eastern tip of a 10 km longbarrier-spit system growing from a raised glacio-marine landscape, now represented only byboulder reefs west and north-west of the present island. Around 4000 years BP another barrier-spitsystem appeared to the south, growing northwards from another raised glacio-marine landscapeat the raised boulder reefs in the town of Byrum and the abrasion landscapes of Rønnerne. Around3000 years BP these two inital barrier-spit systems united and formed one major barrier betweenthe present towns Vesterø and Byrum. To the north-east, a third glacio-marine landscape providedmaterials for the development of the eastern end of the island. Thus, around 2500 BP the island hadbecome one triangular, completely detached island (’the old triangle’) between Vesterø, Byrum andBansten Bakke. From this detached stage, nine subsequent barrier-spit systems grew to the east andformed the present Østerby peninsula, while a series of nine barrier-island complexes developedsouth-west of ’the old triangle’. To the south and south-east, low-energy coasts developed and formedlow beach ridges and saltmarsh landscapes

KW - Laeso

KW - Holocene

KW - beach ridge

KW - relative sea-level curve

KW - isostatic rebound

KW - Lidar DTM

KW - optically stimulated luminescence (OSL) dating

M3 - Journal article

VL - 64

SP - 1

EP - 55

JO - Bulletin of the Geological Society of Denmark

JF - Bulletin of the Geological Society of Denmark

SN - 0011-6297

ER -

ID: 167478918