Tóth, Zsuzsanna and McCarron, Stephen and Wheeler, Andrew J. and Wenau, Stefan and Davis, Stephen and Lim, Aaron and Spiess, Volkhard (2020) Geomorphological and seismostratigraphic evidence for multidirectional polyphase glaciation of the northern Celtic Sea. Journal of Quaternary Science, 35 (3). pp. 465-478. ISSN 0267-8179

Preview

Download (13MB) | Preview

Abstract

High‐resolution seismic and bathymetric data offshore southeast Ireland and LIDaR data in CountyWaterford are presented that partially overlap previous studies. The observed Quaternary stratigraphic successionoffshore southeast Ireland (between Dungarvan and Kilmore Quay) records a sequence of depositional and erosionalevents that supports regional glacial models derived from nearby coastal sediment stratigraphies and landforms. Aregionally widespread, acoustically massive facies interpreted as the‘Irish Sea Till’infills an uneven, channelizedbedrock surface overlying irregular mounds and deposits in bedrock lows that are probably earlier Pleistocenediamicts. The till is truncated and overlain by a thin, stratified facies, suggesting the development of a regionalpalaeolake following ice recession of the Irish Sea Ice Stream. A north–south oriented seabed ridge to the north is interpreted as an esker, representing southward flowing subglacial drainage associated with a restricted ice sheet advance of the Irish Ice Sheet onto the Celtic Sea shelf. Onshore topographic data reveal streamlined bedforms that corroborate a southerly advance of ice onto the shelf across County Waterford. The combined evidence supports previous palaeo glaciological models. Significantly, for the first time, this study defines a southern limit for a Late Midlandian Irish Ice Sheet advance onto the Celtic Sea shelf.

Item Type:	Article
Keywords:	British Irish Ice Sheet; ice limits; northern Celtic Sea; Quaternary stratigraphy; seismics
Academic Unit:	Faculty of Social Sciences > Geography Faculty of Social Sciences > Research Institutes > Irish Climate Analysis and Research Units, ICARUS
Item ID:	15750
Identification Number:	https://doi.org/10.1002/jqs.3189
Depositing User:	Dr. Stephen McCarron
Date Deposited:	29 Mar 2022 14:59
Journal or Publication Title:	Journal of Quaternary Science
Publisher:	Wiley
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

Repository Staff Only(login required)

Item control page

Downloads

Origin of downloads