Palaeoenvironmental reconstruction of Loch Duart (NW Scotland, UK) since the Last Glacial Maximum: implications from a multiproxy approach ...

• Main Authors: Taylor, Jennifer, Selby, David, Lloyd, Jeremy M., Podrecca, Luca, Masterson, Andrew L., Sageman, Bradley B., Szidat, Sönke
• Format: Text
• Language: unknown
• Published: John Wiley & Sons, Ltd. 2024
• Subjects: 540 Chemistry; Ice Sheet
• Online Access: https://dx.doi.org/10.48350/195058; https://boris.unibe.ch/195058/

A sediment core from the salt marsh fringing Loch Duart, NW Scotland, UK, containing Lateglacial to Holocene sediments, was analysed using a multi‐element geochemical approach to elucidate the relative sea level (RSL) and palaeoenvironmental changes associated with the deglaciation of the British and Irish Ice Sheet. Elemental and isotopic measurements of rhenium, osmium, carbon and nitrogen, X‐ray fluorescence scanning, radiocarbon dating, and foraminiferal analysis produced a suite of data that complements the existing biostratigraphic framework. This suite of bio‐, litho‐ and chemostratigraphic analyses permits discussion of RSL changes that reflect the interplay between post‐glacial eustatic rise and glacio‐isostatic adjustment. The osmium‐isotope (187Os/188Os) data, coupled with a new age–depth model, depict an RSL fall between 16.8 and 14.1 ka cal BP at an average rate of 2 mm a−1. Falling RSL culminates in basin isolation and is followed by subsequent marine inundation from 11.6 ka cal BP. This RSL ...