Sand intraclast development and the deformation of glacially-overridden permafrost, West Runton
Glacially‐deformed sediments have often been observed to contain masses of sorted sediment in which delicate sedimentary structures remain preserved. These features, variously termed “lenses”, “blocks”, “intraclasts” range in surface area from a few mm2 to many tens of m2 and when extensive lead to...
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Quaternary Research Association
2011
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ftnerc:oai:nora.nerc.ac.uk:16195 2023-05-15T16:37:44+02:00 Sand intraclast development and the deformation of glacially-overridden permafrost, West Runton Waller, Richard Murton, Julian Phillips, Emrys Lee, Jonathan R. Whiteman, Colin A. Phillips, E. Lee, J.R. Evans, H.M. 2011 text http://nora.nerc.ac.uk/id/eprint/16195/ https://nora.nerc.ac.uk/id/eprint/16195/1/PermafrostWestRunton.pdf http://qra.org.uk/publications/field_guides en eng Quaternary Research Association https://nora.nerc.ac.uk/id/eprint/16195/1/PermafrostWestRunton.pdf Waller, Richard; Murton, Julian; Phillips, Emrys; Lee, Jonathan R.; Whiteman, Colin A. 2011 Sand intraclast development and the deformation of glacially-overridden permafrost, West Runton. In: Phillips, E.; Lee, J.R.; Evans, H.M., (eds.) Glacitectonics : field guide. Quaternary Research Association, 162-181. (QRA field guides). Publication - Book Section NonPeerReviewed 2011 ftnerc 2023-02-04T19:30:22Z Glacially‐deformed sediments have often been observed to contain masses of sorted sediment in which delicate sedimentary structures remain preserved. These features, variously termed “lenses”, “blocks”, “intraclasts” range in surface area from a few mm2 to many tens of m2 and when extensive lead to the development of “glacial mélanges” (e.g. Menzies, 1990a,b; Hoffman and Piotrowski, 2001). Various hypotheses have been proposed to account for the inclusion of sorted‐sediment masses within glacial tills. These include englacial meltwater deposition (Goodchild, 1875), basal freeze‐on and transport within a debris‐rich basal ice layer (e.g. Hoffman and Piotrowski, 2001) and entrainment and deformation within a subglacial deforming layer under both unfrozen (Rappol, 1987, Menzies 1990a) and partially frozen conditions (e.g. Menzies, 1990a; Waller et al., 2009; Waller et al., 2011). In spite of this previous research, their origin and significance remains the subject of debate, largely centering on the conditions required to explain the rheological contrasts inherent in glacial mélanges and the survival of cohesionless coarse‐grained intraclasts within a deforming medium (e.g. Menzies 1990a,b). Book Part Ice permafrost Natural Environment Research Council: NERC Open Research Archive Menzies ENVELOPE(61.911,61.911,-73.437,-73.437) |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Glacially‐deformed sediments have often been observed to contain masses of sorted sediment in which delicate sedimentary structures remain preserved. These features, variously termed “lenses”, “blocks”, “intraclasts” range in surface area from a few mm2 to many tens of m2 and when extensive lead to the development of “glacial mélanges” (e.g. Menzies, 1990a,b; Hoffman and Piotrowski, 2001). Various hypotheses have been proposed to account for the inclusion of sorted‐sediment masses within glacial tills. These include englacial meltwater deposition (Goodchild, 1875), basal freeze‐on and transport within a debris‐rich basal ice layer (e.g. Hoffman and Piotrowski, 2001) and entrainment and deformation within a subglacial deforming layer under both unfrozen (Rappol, 1987, Menzies 1990a) and partially frozen conditions (e.g. Menzies, 1990a; Waller et al., 2009; Waller et al., 2011). In spite of this previous research, their origin and significance remains the subject of debate, largely centering on the conditions required to explain the rheological contrasts inherent in glacial mélanges and the survival of cohesionless coarse‐grained intraclasts within a deforming medium (e.g. Menzies 1990a,b). |
author2 |
Phillips, E. Lee, J.R. Evans, H.M. |
format |
Book Part |
author |
Waller, Richard Murton, Julian Phillips, Emrys Lee, Jonathan R. Whiteman, Colin A. |
spellingShingle |
Waller, Richard Murton, Julian Phillips, Emrys Lee, Jonathan R. Whiteman, Colin A. Sand intraclast development and the deformation of glacially-overridden permafrost, West Runton |
author_facet |
Waller, Richard Murton, Julian Phillips, Emrys Lee, Jonathan R. Whiteman, Colin A. |
author_sort |
Waller, Richard |
title |
Sand intraclast development and the deformation of glacially-overridden permafrost, West Runton |
title_short |
Sand intraclast development and the deformation of glacially-overridden permafrost, West Runton |
title_full |
Sand intraclast development and the deformation of glacially-overridden permafrost, West Runton |
title_fullStr |
Sand intraclast development and the deformation of glacially-overridden permafrost, West Runton |
title_full_unstemmed |
Sand intraclast development and the deformation of glacially-overridden permafrost, West Runton |
title_sort |
sand intraclast development and the deformation of glacially-overridden permafrost, west runton |
publisher |
Quaternary Research Association |
publishDate |
2011 |
url |
http://nora.nerc.ac.uk/id/eprint/16195/ https://nora.nerc.ac.uk/id/eprint/16195/1/PermafrostWestRunton.pdf http://qra.org.uk/publications/field_guides |
long_lat |
ENVELOPE(61.911,61.911,-73.437,-73.437) |
geographic |
Menzies |
geographic_facet |
Menzies |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
https://nora.nerc.ac.uk/id/eprint/16195/1/PermafrostWestRunton.pdf Waller, Richard; Murton, Julian; Phillips, Emrys; Lee, Jonathan R.; Whiteman, Colin A. 2011 Sand intraclast development and the deformation of glacially-overridden permafrost, West Runton. In: Phillips, E.; Lee, J.R.; Evans, H.M., (eds.) Glacitectonics : field guide. Quaternary Research Association, 162-181. (QRA field guides). |
_version_ |
1766028040845918208 |