High-resolution seismic imaging of a Younger Dryas and Holocene mass movement complex in glacial lake Windermere, UK
High-resolution seismic imaging of a Younger Dryas and Holocene mass movement complex in glacial lake Windermere, UK
The stratigraphy and sedimentological processes operating over the last 15,000 years within glacial lake Windermere (UK), at the mouth of Cunsey Beck, were imaged by a decimetre-resolution seismic reflection survey. A complex of fifteen mass movement deposits was identified as contemporaneous with the Younger Dryas, and two within the overlying Holocene drape. The high vertical resolution and dense grid of profiles allowed pseudo three-dimensional mapping of individual events, along with the determination of their relative temporal relationships. The size of the mass wasting deposits has been estimated to range between 2100 and > 100,000 m3. The geometry, structure and relationship to the existing stratigraphy suggest a rapid emplacement of the Younger Dryas mass movement deposits, facilitated by climatic changes making subaqueous slopes unstable, with possible triggering by seismic activity. Morphometric parameters, such as volume and planar surface area, indicate a greater mobility of the Younger Dryas mass movement deposits compared to the Holocene events. The sediments of all imaged mass movement deposits are believed to originate from the slope deposits of the lake. The age of two Holocene mass movement deposits, triggered by flooding or terrestrial debris flows, is estimated to be 2400 and 4400 years BP.
high-resolution seismic imagery, younger dryas holocene, mass movement, windermere, parametric sub-bottom profiler
42-57
Lowag, J.
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Bull, J.M.
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Vardy, M.E.
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Miller, H.
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Pinson, L.J.W.
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15 October 2012
Lowag, J.
b42f2356-87d1-4d43-b0fe-c13208c7fcbf
Bull, J.M.
974037fd-544b-458f-98cc-ce8eca89e3c8
Vardy, M.E.
8dd019dc-e57d-4b49-8f23-0fa6d246e69d
Miller, H.
ae9e9e7c-5fac-4031-a58a-bd71d74b36df
Pinson, L.J.W.
2a5d9ecb-ab4b-4f0a-87da-bea2ab5c9b06
Lowag, J., Bull, J.M., Vardy, M.E., Miller, H. and Pinson, L.J.W.
(2012)
High-resolution seismic imaging of a Younger Dryas and Holocene mass movement complex in glacial lake Windermere, UK.
Geomorphology, 171-172, .
(doi:10.1016/j.geomorph.2012.05.002).
Abstract
The stratigraphy and sedimentological processes operating over the last 15,000 years within glacial lake Windermere (UK), at the mouth of Cunsey Beck, were imaged by a decimetre-resolution seismic reflection survey. A complex of fifteen mass movement deposits was identified as contemporaneous with the Younger Dryas, and two within the overlying Holocene drape. The high vertical resolution and dense grid of profiles allowed pseudo three-dimensional mapping of individual events, along with the determination of their relative temporal relationships. The size of the mass wasting deposits has been estimated to range between 2100 and > 100,000 m3. The geometry, structure and relationship to the existing stratigraphy suggest a rapid emplacement of the Younger Dryas mass movement deposits, facilitated by climatic changes making subaqueous slopes unstable, with possible triggering by seismic activity. Morphometric parameters, such as volume and planar surface area, indicate a greater mobility of the Younger Dryas mass movement deposits compared to the Holocene events. The sediments of all imaged mass movement deposits are believed to originate from the slope deposits of the lake. The age of two Holocene mass movement deposits, triggered by flooding or terrestrial debris flows, is estimated to be 2400 and 4400 years BP.
Text
Lowag_et_al_2013_Geomorphology_authors_copy.pdf
- Accepted Manuscript
More information
e-pub ahead of print date: 11 May 2012
Published date: 15 October 2012
Keywords:
high-resolution seismic imagery, younger dryas holocene, mass movement, windermere, parametric sub-bottom profiler
Organisations:
Geology & Geophysics
Identifiers
Local EPrints ID: 340099
URI: http://eprints.soton.ac.uk/id/eprint/340099
ISSN: 0169-555X
PURE UUID: c8ab3d6f-4752-4a16-a4c5-8852d1721db4
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Date deposited: 11 Jun 2012 12:56
Last modified: 15 Mar 2024 02:44
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Contributors
Author:
J. Lowag
Author:
M.E. Vardy
Author:
H. Miller
Author:
L.J.W. Pinson
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