The timing and consequences of the blockage of the Humber Gap by the last British−Irish Ice Sheet
The eastern England terrestrial glacial sequences are critical to the spatial and temporal reconstruction of the last British−Irish Ice sheet ( BIIS ). Understanding glacial behaviour in the area of the Humber Gap is key as its blockage by ice created extensive proglacial lakes. This paper maps the...
Published in: | Boreas |
---|---|
Main Authors: | , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2017
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/bor.12256 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fbor.12256 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12256 |
id |
crwiley:10.1111/bor.12256 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/bor.12256 2024-09-15T18:12:22+00:00 The timing and consequences of the blockage of the Humber Gap by the last British−Irish Ice Sheet Bateman, Mark D. Evans, David J. A. Roberts, David H. Medialdea, Alicia Ely, Jeremy Clark, Chris D. Natural Environment Research Council 2017 http://dx.doi.org/10.1111/bor.12256 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fbor.12256 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12256 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Boreas volume 47, issue 1, page 41-61 ISSN 0300-9483 1502-3885 journal-article 2017 crwiley https://doi.org/10.1111/bor.12256 2024-07-30T04:20:48Z The eastern England terrestrial glacial sequences are critical to the spatial and temporal reconstruction of the last British−Irish Ice sheet ( BIIS ). Understanding glacial behaviour in the area of the Humber Gap is key as its blockage by ice created extensive proglacial lakes. This paper maps the glacial geomorphology of the Humber Gap region to establish for the first time the extent and thickness of the North Sea Lobe ( NSL ) of the BIIS . Findings establish the westerly maximal limit of the NSL . Ten new luminescence ages from across the region show the initial Skipsea Till advance to the maximal limits occurred regionally at c. 21.6 ka (Stage 1) and retreated off‐shore c. 18 ka (Stage 2). Punctuated retreat is evident in the south of the region whilst to the immediate north retreat was initially rapid before a series of near synchronous ice advances (including the Withernsea Till advance) occurred at c. 16.8 ka (Stage 3). Full withdrawal of BIIS ice occurred prior to c. 15 ka (Stage 4). Geomorphic mapping and stratigraphy confirms the existence of a proto Lake Humber prior to Stage 1, which persisted to Stage 3 expanding eastward as the NSL ice retreated. It appears that proglacial lakes formed wherever the NSL encountered low topography and reverse gradients during both phases of both advance and retreat. These lakes may in part help explain the dynamism of parts of the NSL, as they initiated ice draw down and associated streaming/surging. The above record of ice‐dammed lakes provides an analogue for now off‐shore parts of the BIIS where it advanced as a number of asynchronous lowland lobes. Article in Journal/Newspaper Ice Sheet Wiley Online Library Boreas 47 1 41 61 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
The eastern England terrestrial glacial sequences are critical to the spatial and temporal reconstruction of the last British−Irish Ice sheet ( BIIS ). Understanding glacial behaviour in the area of the Humber Gap is key as its blockage by ice created extensive proglacial lakes. This paper maps the glacial geomorphology of the Humber Gap region to establish for the first time the extent and thickness of the North Sea Lobe ( NSL ) of the BIIS . Findings establish the westerly maximal limit of the NSL . Ten new luminescence ages from across the region show the initial Skipsea Till advance to the maximal limits occurred regionally at c. 21.6 ka (Stage 1) and retreated off‐shore c. 18 ka (Stage 2). Punctuated retreat is evident in the south of the region whilst to the immediate north retreat was initially rapid before a series of near synchronous ice advances (including the Withernsea Till advance) occurred at c. 16.8 ka (Stage 3). Full withdrawal of BIIS ice occurred prior to c. 15 ka (Stage 4). Geomorphic mapping and stratigraphy confirms the existence of a proto Lake Humber prior to Stage 1, which persisted to Stage 3 expanding eastward as the NSL ice retreated. It appears that proglacial lakes formed wherever the NSL encountered low topography and reverse gradients during both phases of both advance and retreat. These lakes may in part help explain the dynamism of parts of the NSL, as they initiated ice draw down and associated streaming/surging. The above record of ice‐dammed lakes provides an analogue for now off‐shore parts of the BIIS where it advanced as a number of asynchronous lowland lobes. |
author2 |
Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Bateman, Mark D. Evans, David J. A. Roberts, David H. Medialdea, Alicia Ely, Jeremy Clark, Chris D. |
spellingShingle |
Bateman, Mark D. Evans, David J. A. Roberts, David H. Medialdea, Alicia Ely, Jeremy Clark, Chris D. The timing and consequences of the blockage of the Humber Gap by the last British−Irish Ice Sheet |
author_facet |
Bateman, Mark D. Evans, David J. A. Roberts, David H. Medialdea, Alicia Ely, Jeremy Clark, Chris D. |
author_sort |
Bateman, Mark D. |
title |
The timing and consequences of the blockage of the Humber Gap by the last British−Irish Ice Sheet |
title_short |
The timing and consequences of the blockage of the Humber Gap by the last British−Irish Ice Sheet |
title_full |
The timing and consequences of the blockage of the Humber Gap by the last British−Irish Ice Sheet |
title_fullStr |
The timing and consequences of the blockage of the Humber Gap by the last British−Irish Ice Sheet |
title_full_unstemmed |
The timing and consequences of the blockage of the Humber Gap by the last British−Irish Ice Sheet |
title_sort |
timing and consequences of the blockage of the humber gap by the last british−irish ice sheet |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1111/bor.12256 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fbor.12256 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12256 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Boreas volume 47, issue 1, page 41-61 ISSN 0300-9483 1502-3885 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/bor.12256 |
container_title |
Boreas |
container_volume |
47 |
container_issue |
1 |
container_start_page |
41 |
op_container_end_page |
61 |
_version_ |
1810449944282136576 |