Holocene land- and sea-level changes in Great Britain
Article first published online: 31 OCT 2002
Copyright © 2002 John Wiley & Sons, Ltd.
Journal of Quaternary Science
Special Issue: Sea-Level Changes and Neotectonics
Volume 17, Issue 5-6, pages 511–526, July - September 2002
How to Cite
Shennan, I. and Horton, B. (2002), Holocene land- and sea-level changes in Great Britain. J. Quaternary Sci., 17: 511–526. doi: 10.1002/jqs.710
- Issue published online: 31 OCT 2002
- Article first published online: 31 OCT 2002
- Manuscript Accepted: 3 JUL 2002
- Manuscript Revised: 21 JUN 2002
- Manuscript Received: 5 JAN 2002
- Natural Environment Research Council (UK). Grant Number: GST/02/0760 and GST/02/0761.
- relative sea level;
- crustal movements;
- sediment compaction;
- tidal changes
Analysis of more than 1200 radiocarbon dated samples that constrain relative sea-levels in Great Britain over the past 16 000 yr provides estimates of current land-level changes (negative of relative sea-level change). Maximum relative land uplift occurs in central and western Scotland, ca. 1.6 mm yr−1, and maximum subsidence is in southwest England, ca. 1.2 mm yr−1. Sediment consolidation, arising from autocompaction as the sediment accumulates and from land drainage, increases the subsidence in areas with thick sequences of Holocene sediments, with an average effect equivalent to at least an extra ca. 0.2 mm yr−1 land subsidence, but more in parts of southeast England, 0.5–1.1 mm yr−1. Modelled changes in tidal range during the mid- to late Holocene in eastern England suggest that the calculated rate of land subsidence is overestimated unless such changes are quantified. The effect is most significant for large coastal lowlands, the Fenland and Humber (ca. 0.5 and 0.6 mm yr−1), that were tidal embayments during the mid- to late Holocene. Copyright © 2002 John Wiley & Sons, Ltd.