Genesis and provenance of a new Middle Pleistocene diamicton unit at Happisburgh, NE Norfolk, UK

Hodkin, Richard G., Lee, Jonathan R., Riding, James B. and Turner, Jenni A. (2016) Genesis and provenance of a new Middle Pleistocene diamicton unit at Happisburgh, NE Norfolk, UK. Proceedings of the Yorkshire Geological Society, 61. pp. 25-35. ISSN 0044-0604

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Abstract

Glacigenic deposits at Happisburgh, NE Norfolk, record the earliest known expansion of glaciers into lowland eastern England during the Quaternary. The sequence comprises two regionally extensive till units, the Happisburgh Till and Corton Diamicton members of the Happisburgh Glacigenic Formation, deposited during separate ice advances, and intervening glacilacustrine and outwash deposits laid down during ice-marginal retreat. During 2012, a new diamicton unit was discovered within the intervening sorted sediments and its significance is outlined here. Sedimentological and structural evidence suggests, tentatively, that the diamicton forms a small debris fan generated subaerially by a series of water-saturated hyperconcentrated or debris flows. The precise trigger mechanism for these flow deposits remains unclear, but may relate to seasonal melting of surface or buried ice followed by mass-movement, or to more abrupt geological events including periods of intense rainfall, moraine dam failure or a glacier outburst flood.

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
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Depositing User: Pure Connector
Date Deposited: 24 Sep 2016 00:01
Last Modified: 22 Apr 2020 01:33
URI: https://ueaeprints.uea.ac.uk/id/eprint/59773
DOI: 10.1144/pygs2015-367

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