Beach-ridge formation as a possible indicator for an open Limfjord – North Sea connection

Trine Holm Freiesleben; Lasse Rokkedahl Berntsen; Maria Blæsbjerg; Emilia Høffer; Christian Frigaard Rasmussen; Nicolaj Krog Larsen

doi:10.34194/geusb.v57.8358

Beach-ridge formation as a possible indicator for an open Limfjord – North Sea connection

Trine Holm Freiesleben^*, Lasse Rokkedahl Berntsen, Maria Blæsbjerg, Emilia Høffer, Christian Frigaard Rasmussen, Nicolaj Krog Larsen

^*Corresponding author for this work

Department of Ecoscience - Arctic Environment

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Abstract

Raised beach ridges are prograded sequences of wave-built deposits that may provide valuable information about past relative sea-level changes, climate change and coastal evolution. In the Limfjord in northern Denmark, the Early and Middle Holocene sea-level changes are well-constrained. However, our understanding of Late Holocene sea-level fluctuations is limited, and the exact period when the coastal barrier between the Limfjord and the North Sea formed remains uncertain. In this study, we use optically stimulated luminescence (OSL) dating to determine the age of raised beach ridges at Gjellerodde in the western part of the Limfjord. The OSL ages presented here indicate that the beach ridges formed during three periods at 3.3–2.7, 1.4–1.0, 0.2–0.1 ka. In addition our data suggest a c. 0.2 mm/yr relative sea-level fall during the Late Holocene. The three distinct periods of beach-ridge formation coincide with periods when the Limfjord was open towards the North Sea as documented in historical records and marine records. This suggests that OSL dating of beach ridges can be used as a potential indicator for determining when the connection between the Limfjord and the North Sea was open in the Late Holocene.

Original language	English
Article number	8358
Journal	GEUS Bulletin
Volume	57
ISSN	2597-2154
DOIs	https://doi.org/10.34194/geusb.v57.8358
Publication status	Published - Jan 2024

Keywords

Gjellerodde
Limfjord
beach-ridge formation
optically stimulated luminescence
relative sea-level change

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10.34194/geusb.v57.8358Licence: CC BY

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title = "Beach-ridge formation as a possible indicator for an open Limfjord – North Sea connection",

abstract = "Raised beach ridges are prograded sequences of wave-built deposits that may provide valuable information about past relative sea-level changes, climate change and coastal evolution. In the Limfjord in northern Denmark, the Early and Middle Holocene sea-level changes are well-constrained. However, our understanding of Late Holocene sea-level fluctuations is limited, and the exact period when the coastal barrier between the Limfjord and the North Sea formed remains uncertain. In this study, we use optically stimulated luminescence (OSL) dating to determine the age of raised beach ridges at Gjellerodde in the western part of the Limfjord. The OSL ages presented here indicate that the beach ridges formed during three periods at 3.3–2.7, 1.4–1.0, 0.2–0.1 ka. In addition our data suggest a c. 0.2 mm/yr relative sea-level fall during the Late Holocene. The three distinct periods of beach-ridge formation coincide with periods when the Limfjord was open towards the North Sea as documented in historical records and marine records. This suggests that OSL dating of beach ridges can be used as a potential indicator for determining when the connection between the Limfjord and the North Sea was open in the Late Holocene.",

keywords = "Gjellerodde, Limfjord, beach-ridge formation, optically stimulated luminescence, relative sea-level change",

author = "{Holm Freiesleben}, Trine and {Rokkedahl Berntsen}, Lasse and Maria Bl{\ae}sbjerg and Emilia H{\o}ffer and Rasmussen, {Christian Frigaard} and Larsen, {Nicolaj Krog}",

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AU - Holm Freiesleben, Trine

AU - Rokkedahl Berntsen, Lasse

AU - Blæsbjerg, Maria

AU - Høffer, Emilia

AU - Rasmussen, Christian Frigaard

AU - Larsen, Nicolaj Krog

PY - 2024/1

Y1 - 2024/1

N2 - Raised beach ridges are prograded sequences of wave-built deposits that may provide valuable information about past relative sea-level changes, climate change and coastal evolution. In the Limfjord in northern Denmark, the Early and Middle Holocene sea-level changes are well-constrained. However, our understanding of Late Holocene sea-level fluctuations is limited, and the exact period when the coastal barrier between the Limfjord and the North Sea formed remains uncertain. In this study, we use optically stimulated luminescence (OSL) dating to determine the age of raised beach ridges at Gjellerodde in the western part of the Limfjord. The OSL ages presented here indicate that the beach ridges formed during three periods at 3.3–2.7, 1.4–1.0, 0.2–0.1 ka. In addition our data suggest a c. 0.2 mm/yr relative sea-level fall during the Late Holocene. The three distinct periods of beach-ridge formation coincide with periods when the Limfjord was open towards the North Sea as documented in historical records and marine records. This suggests that OSL dating of beach ridges can be used as a potential indicator for determining when the connection between the Limfjord and the North Sea was open in the Late Holocene.

AB - Raised beach ridges are prograded sequences of wave-built deposits that may provide valuable information about past relative sea-level changes, climate change and coastal evolution. In the Limfjord in northern Denmark, the Early and Middle Holocene sea-level changes are well-constrained. However, our understanding of Late Holocene sea-level fluctuations is limited, and the exact period when the coastal barrier between the Limfjord and the North Sea formed remains uncertain. In this study, we use optically stimulated luminescence (OSL) dating to determine the age of raised beach ridges at Gjellerodde in the western part of the Limfjord. The OSL ages presented here indicate that the beach ridges formed during three periods at 3.3–2.7, 1.4–1.0, 0.2–0.1 ka. In addition our data suggest a c. 0.2 mm/yr relative sea-level fall during the Late Holocene. The three distinct periods of beach-ridge formation coincide with periods when the Limfjord was open towards the North Sea as documented in historical records and marine records. This suggests that OSL dating of beach ridges can be used as a potential indicator for determining when the connection between the Limfjord and the North Sea was open in the Late Holocene.

KW - Gjellerodde

KW - Limfjord

KW - beach-ridge formation

KW - optically stimulated luminescence

KW - relative sea-level change

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ER -

Beach-ridge formation as a possible indicator for an open Limfjord – North Sea connection

Abstract

Keywords

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