Conti, Martina L.G., Bates, Martin R., Preece, Richard C. et al. (2 more authors) (2020) Molecular fossils as a tool for tracking Holocene sea-level change in the Loch of Stenness, Orkney. Journal of Quaternary Science. pp. 881-891. ISSN 0267-8179
Abstract
Sediments deposited in the Loch of Stenness (Orkney Islands, Scotland) during the Holocene transgression, previously dated to between ~5939–5612 bp, were analysed for molecular fossils – lipids and chlorophyll pigments from primary producers – that complement conventional microfossil and lithological approaches for studying past sea-level change. While microfossil and lithological studies identified a transgression between 102 and 81 cm core depth, key molecular fossils fluctuate in occurrence and concentration between 118 and 85 cm, suggesting an earlier start to the transgression. Terrestrial lipid concentrations decreased and algal-derived, short-chain, n-alkanoic acid concentrations increased at 118 cm, indicating a disruption of the freshwater lake conditions associated with the early stages of the marine transgression. The lipid and pigment analyses provided information that complements and extends that from microfossil analysis, presenting a more complete record of Holocene sea-level changes and local vegetation changes in the Loch of Stenness. The isostatic stability of Stenness during the Holocene points towards other factors to explain the transgression, such as regional factors and/or melting of the Antarctic ice sheet (which occurred up to 3 ka).
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 The Authors. Journal of Quaternary Science Published by John Wiley & Sons Ltd. |
Keywords: | chlorophylls,Holocene,lipids,molecular fossils,sea level |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | Pure (York) |
Date Deposited: | 19 Aug 2020 10:10 |
Last Modified: | 19 Oct 2024 00:05 |
Published Version: | https://doi.org/10.1002/jqs.3238 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1002/jqs.3238 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:164615 |