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Late Glacial to Holocene relative sea-level change in Assynt, northwest Scotland, UK.

Hamilton, C. and Lloyd, J.M. and Barlow, N.L.M. and Innes, J.B. and Flecker, R. and Thomas, C. (2015) 'Late Glacial to Holocene relative sea-level change in Assynt, northwest Scotland, UK.', Quaternary research., 84 (2). pp. 214-222.

Abstract

Relative sea-level change (RSL), from the Late Glacial through to the late Holocene, is reconstructed for the Assynt region, northwest Scotland, based on bio- and lithostratigraphical analysis. Four new radiocarbon-dated sea-level index points help constrain RSL change for the Late Glacial to late Holocene. These new data, in addition to published material, capture the RSL fall during the Late Glacial and the rise and fall associated with the mid-Holocene highstand. Two of these index points constrain the Late Glacial RSL history in Assynt for the first time, reconstructing RSL falling from 2.47 ± 0.59 m OD to 0.15 ± 0.59 m OD at c. 14000 - 15000 cal yr BP. These new data test model predictions of glacial isostatic adjustment (GIA), particularly during the early deglacial period which is currently poorly constrained throughout the British Isles. While the empirical data from the mid- to late-Holocene to present matches quite well with recent GIA model output, there is a relatively poor fit between the timing of the Late Glacial RSL fall and early Holocene RSL rise. This mismatch, also evident elsewhere in northwest Scotland, may result from uncertainties associated with both the global and local ice components of GIA models.

Item Type:Article
Keywords:Sea level, Glacial isostatic adjustment, Palaeoenvironmental reconstruction, Late Glacial.
Full text:(AM) Accepted Manuscript
Available under License - Creative Commons Attribution Non-commercial No Derivatives.
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1016/j.yqres.2015.07.001
Publisher statement:© 2015 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Record Created:30 Jul 2015 15:05
Last Modified:31 Jul 2016 00:39

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