Show simple item record A. J. en_US P. en_US H. M. en_US 2010-12-08T09:43:55Z 2010-12-08T09:43:55Z 2009-03-01 en_US
dc.identifier en_US
dc.identifier.citation Plater , A J , Stupples , P & Roberts , H M 2009 , ' Evidence of episodic coastal change during the Late Holocene: The Dungeness barrier complex, SE England ' Geomorphology , vol 104 , no. 1-2 , pp. 47-58 . , 10.1016/j.geomorph.2008.05.014 en_US
dc.identifier.other PURE: 154970 en_US
dc.identifier.other dspace: 2160/5998 en_US
dc.description.abstract The sediments of the Dungeness gravel foreland and, in particular, the back-barrier marshland of Romney Marsh are studied in an investigation of (i) temporal and spatial changes in the relative importance of factors driving drift-aligned barrier evolution and (ii) non-linear coastal change. Evidence from palaeomagnetic secular variation (PSV) dating of six marshland cores coupled with particle size data and statistical analysis of heterolithic tidal rhythmites reveals a phase Of rapid tidal sedimentation in both inter- and back-barrier 'lows' during the period of c. 1100 to 500 years ago, driven primarily by changing coastal morphology, accommodation space and tidal dynamics. Variations in particle size and layer thickness can be related directly to tidal cyclicity, from which accretion rates of the order of 0.3 m/year are determined. Once shoreface emergence occurred, it is apparent that gravel barrier and marshland deposition were both episodic and rapid. Within this non-linear response, two periods of episodic marshland accretion are identified: an earlier one 1100-600 years ago resulting from cannibalisation Of the Southern shore of Dungeness foreland and inundation of the exposed inter-ridge lows, and a later period about 600-500 years ago in a true back-barrier setting created by eastward extension of the shoreface spit and foreland ness. A high level of inter-dependence between shoreface, barrier and back- (and inter-) barrier environments is confirmed, as well as marked non-linearity directly related to this inter-dependence. Here, drift-aligned gravel foreland evolution takes place through lateral (down-drift) rollover controlled by shoreface topography and Continued sediment supply through cannibalisation (sediment recycling). (C) 2008 Elsevier B.V. All rights reserved. en_US
dc.format.extent 12 en_US
dc.relation.ispartof Geomorphology en_US
dc.subject HISTORY en_US
dc.subject Holocene depositional history en_US
dc.subject INCLINATION en_US
dc.subject RECORD en_US
dc.subject Gravel foreland progradation en_US
dc.subject Heterolithic rhythmites en_US
dc.subject Drift-aligned barrier en_US
dc.subject CHANNEL en_US
dc.subject BRITAIN en_US
dc.subject Palaeomagnetic secular variation (PSV) dating en_US
dc.subject REMANENCE en_US
dc.subject LAKE-SEDIMENT en_US
dc.subject Tidal sedimentation en_US
dc.title Evidence of episodic coastal change during the Late Holocene: The Dungeness barrier complex, SE England en_US
dc.contributor.pbl Institute of Geography & Earth Sciences en_US
dc.contributor.pbl Quaternary Environmental Change Group en_US

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