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Glacial and paraglacial history of the Troutbeck Valley, Cumbria, UK: integrating airborne LiDAR, multibeam bathymetry, and geological field mapping

Glacial and paraglacial history of the Troutbeck Valley, Cumbria, UK: integrating airborne LiDAR, multibeam bathymetry, and geological field mapping
Glacial and paraglacial history of the Troutbeck Valley, Cumbria, UK: integrating airborne LiDAR, multibeam bathymetry, and geological field mapping
High resolution airborne LiDAR (light detection and ranging) and multibeam bathymetry data, supplemented by geomorphological and geological field mapping are used to derive the glacial and post-glacial history of Troutbeck Valley (English Lake District) at a catchment scale. The results inform wider regional and ice sheet wide glacial reconstructions and demonstrate the effectiveness of an integrated approach combining geomorphological and sedimentological signatures with remote sensing. The holistic catchment approach is used to reconstruct palaeo-ice flow and behaviour of a small part of the last British and Irish Ice Sheet, identifying a series of depositional environments that accompanied both ice advance, ice retreat and post-glacial deposition within the Lake District. Drumlins are mapped in the lower catchment and show multiple regional (wider-extent) ice flow events and a sedimentology consistent with deposition by lodgement processes during the Main Late Devensian Stadial. Other subglacial deposits include till sequences formed under variable basal conditions beneath an advancing ice mass. Retreat features include a suite of recessional moraines formed by still-stands or small readvances of an outlet glacier. Following deglaciation, major sediment redistribution led to formation of a large fan delta via paraglacial and post-glacial fluvial sedimentation. This study indicates that an integrated approach, using geomorphology, sedimentology and remote sensing on a catchment scale, is capable of deriving a more in-depth understanding of regional ice sheet reconstructions and highlights the complexity of palaeo-ice sheet dynamics at a range of spatial scales.
glacial geomorphology, sedimentology, catchment scale, lake district, troutbeck valley
0016-7878
31-40
Miller, H.
ae9e9e7c-5fac-4031-a58a-bd71d74b36df
Cotterill, C.J.
256cbaac-35fb-424d-aee1-338cdfe025ab
Bradwell, T
620b952b-2fb6-4b8a-a00e-cfcfb414b3ea
Miller, H.
ae9e9e7c-5fac-4031-a58a-bd71d74b36df
Cotterill, C.J.
256cbaac-35fb-424d-aee1-338cdfe025ab
Bradwell, T
620b952b-2fb6-4b8a-a00e-cfcfb414b3ea

Miller, H., Cotterill, C.J. and Bradwell, T (2014) Glacial and paraglacial history of the Troutbeck Valley, Cumbria, UK: integrating airborne LiDAR, multibeam bathymetry, and geological field mapping. Proceedings of the Geologists' Association, 125 (1), 31-40. (doi:10.1016/j.pgeola.2013.04.007).

Record type: Article

Abstract

High resolution airborne LiDAR (light detection and ranging) and multibeam bathymetry data, supplemented by geomorphological and geological field mapping are used to derive the glacial and post-glacial history of Troutbeck Valley (English Lake District) at a catchment scale. The results inform wider regional and ice sheet wide glacial reconstructions and demonstrate the effectiveness of an integrated approach combining geomorphological and sedimentological signatures with remote sensing. The holistic catchment approach is used to reconstruct palaeo-ice flow and behaviour of a small part of the last British and Irish Ice Sheet, identifying a series of depositional environments that accompanied both ice advance, ice retreat and post-glacial deposition within the Lake District. Drumlins are mapped in the lower catchment and show multiple regional (wider-extent) ice flow events and a sedimentology consistent with deposition by lodgement processes during the Main Late Devensian Stadial. Other subglacial deposits include till sequences formed under variable basal conditions beneath an advancing ice mass. Retreat features include a suite of recessional moraines formed by still-stands or small readvances of an outlet glacier. Following deglaciation, major sediment redistribution led to formation of a large fan delta via paraglacial and post-glacial fluvial sedimentation. This study indicates that an integrated approach, using geomorphology, sedimentology and remote sensing on a catchment scale, is capable of deriving a more in-depth understanding of regional ice sheet reconstructions and highlights the complexity of palaeo-ice sheet dynamics at a range of spatial scales.

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More information

e-pub ahead of print date: 22 May 2013
Published date: January 2014
Keywords: glacial geomorphology, sedimentology, catchment scale, lake district, troutbeck valley
Organisations: Geology & Geophysics

Identifiers

Local EPrints ID: 353053
URI: https://eprints.soton.ac.uk/id/eprint/353053
ISSN: 0016-7878
PURE UUID: 80a1bd19-bdcc-4fb4-b722-09379c6df629

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Date deposited: 24 May 2013 12:37
Last modified: 18 Jul 2017 04:08

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Contributors

Author: H. Miller
Author: C.J. Cotterill
Author: T Bradwell

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