Ulster University Logo

Ulster Institutional Repository

Storm swash terraces: a previously overlooked element of the cliff-shore platform system

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

McKenna, John, Cooper, Andrew and Jackson, Derek (2012) Storm swash terraces: a previously overlooked element of the cliff-shore platform system. Journal of Sedimentary Research, 82 . pp. 260-269. [Journal article]

[img]PDF
Indefinitely restricted to Repository staff only.

1123Kb

DOI: 10.2110/jsr.2012.24

Abstract

Storm swash terraces are a distinctive and previously unreported component of the cliff-shore platform sedimentary system. They consist of laminated marine sands and gravels with occasional large, rounded clasts and fine muddy laminae. The planar deposits dip gently seaward, are up to 1 m thick at the seaward margin, and thin landwards, forming a wedge. They are laterally continuous over tens of meters in a coast-parallel dimension. They occur in coastal re-entrants at the rear of boulder beaches and shore platforms at elevations between 1 and 9 m above contemporary high-tide level. The terrace sediments represent deposition at the limit of wave run-up during extreme storms; during such events wave energy is largely dissipated by a shore platform and/or boulder beach but sufficient energy remains to carry water and fine sediment to higher levels, where it then accumulates. The deposition and preservation of storm swash terraces depend on a coastal topography that combines partial wave-energy dissipation on a shore platform or boulder beach with available depositional space to landwards. These deposits contain a sedimentary record of past storminess on high-energy coasts that has yet to be exploited.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Environmental Sciences
Research Institutes and Groups:Environmental Sciences Research Institute
Environmental Sciences Research Institute > Coastal Systems
ID Code:21890
Deposited By:Professor Andrew Cooper
Deposited On:24 Apr 2012 13:20
Last Modified:14 Oct 2013 11:15

Repository Staff Only: item control page