Beach-ridge formation as a possible indicator for an open Limfjord – North Sea connection
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Beach-ridge formation as a possible indicator for an open Limfjord – North Sea connection. / Freiesleben, Trine; Berntsen, Lasse Rokkedahl; Blæsbjerg, Maria; Høffer, Emilia; Rasmussen, Christian F.; Larsen, Nicolaj K.
In: GEUS Bulletin, Vol. 57, 8358, 2024.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Beach-ridge formation as a possible indicator for an open Limfjord – North Sea connection
AU - Freiesleben, Trine
AU - Berntsen, Lasse Rokkedahl
AU - Blæsbjerg, Maria
AU - Høffer, Emilia
AU - Rasmussen, Christian F.
AU - Larsen, Nicolaj K.
N1 - Publisher Copyright: © 2024, GEUS - Geological Survey of Denmark and Greenland. All rights reserved.
PY - 2024
Y1 - 2024
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 - beach-ridge formation
KW - Gjellerodde
KW - Limfjord
KW - optically stimulated luminescence
KW - relative sea-level change
U2 - 10.34194/geusb.v57.8358
DO - 10.34194/geusb.v57.8358
M3 - Journal article
AN - SCOPUS:85184218247
VL - 57
JO - GEUS Bulletin
JF - GEUS Bulletin
SN - 2597-2162
M1 - 8358
ER -
ID: 382546722