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Facies of subglacial channel sedimentation in late-Pleistocene drumlins, Northern Ireland

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DARDIS, GF and MCCABE, AM (1983) Facies of subglacial channel sedimentation in late-Pleistocene drumlins, Northern Ireland. BOREAS, 12 (4). pp. 263-278. [Journal article]

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DOI: 10.1111/j.1502-3885.1983.tb00321.x

Abstract

The sedimentology of three sand-cored drumlins in central Ulster. Northern Ireland is described. The sand-cores of the drumlins consist of complex sequences of cohesive sediment gravity forms, grain-flow deposits, turbiditic sands and deltaic sands and gravels, showing complex fades relationships. The bulk of the sediments formed in water-filled cavities associated with a major subglacial meltwater escape route excavated in bedrock. The sand-cores are overlain by a streamlined carapace of basal melt-out till. A model is presented to account for spatial variations in faeies arrangement within the sand-cores. Three specific meltwater depositional subenvironments were recognised: (1) main channel axis, (2) main channel flank, and (3) minor tributary channel. The sand-cores formed prior to the main phase of basal melt-out till deposition and before drumlin streamlining.

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 > Quaternary Environmental Change
ID Code:23126
Deposited By:Mrs Linda Allen
Deposited On:04 Sep 2012 11:37
Last Modified:04 Sep 2012 11:37

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