The ability of ice‐flow indicators to record complex, historic deglaciation events, Burroughs Glacier, Alaska
Known changes in ice‐flow direction during a 100‐year interval have been used to evaluate how well ice‐flow indicators record complex deglaciation events. At Burroughs Glacier, nunataks emerging from a thinning Neoglacial ice mass and differential ice‐surface lowering caused by calving ice margins h...
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crwiley:10.1111/j.1502-3885.1995.tb00776.x 2024-06-02T08:07:01+00:00 The ability of ice‐flow indicators to record complex, historic deglaciation events, Burroughs Glacier, Alaska SYVERSON, KENT M. 1995 http://dx.doi.org/10.1111/j.1502-3885.1995.tb00776.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1995.tb00776.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1995.tb00776.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 24, issue 3, page 232-244 ISSN 0300-9483 1502-3885 journal-article 1995 crwiley https://doi.org/10.1111/j.1502-3885.1995.tb00776.x 2024-05-03T11:23:17Z Known changes in ice‐flow direction during a 100‐year interval have been used to evaluate how well ice‐flow indicators record complex deglaciation events. At Burroughs Glacier, nunataks emerging from a thinning Neoglacial ice mass and differential ice‐surface lowering caused by calving ice margins have produced major changes in ice‐flow direction sincc 1892. Cross‐cutting striae with angles of divergence of up to 105′ reflect the past range of flow directions in the area. Striae from the oldest flow events are deepest, and striae from some late‐stage flow events are missing. This may be caused by overprinting during late‐stage reversals in the direction of ice movement. The orientation of flutes and surficial bullet boulders reflects the final ice‐flow direction, but boulder orientations are less clustered than flute orientations. Surficial till pebble fabrics are weakly to moderately developed, but till fabrics vary with depth and record ice‐flow direction changes with time. Article in Journal/Newspaper glacier Alaska Wiley Online Library Boreas 24 3 232 244 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Known changes in ice‐flow direction during a 100‐year interval have been used to evaluate how well ice‐flow indicators record complex deglaciation events. At Burroughs Glacier, nunataks emerging from a thinning Neoglacial ice mass and differential ice‐surface lowering caused by calving ice margins have produced major changes in ice‐flow direction sincc 1892. Cross‐cutting striae with angles of divergence of up to 105′ reflect the past range of flow directions in the area. Striae from the oldest flow events are deepest, and striae from some late‐stage flow events are missing. This may be caused by overprinting during late‐stage reversals in the direction of ice movement. The orientation of flutes and surficial bullet boulders reflects the final ice‐flow direction, but boulder orientations are less clustered than flute orientations. Surficial till pebble fabrics are weakly to moderately developed, but till fabrics vary with depth and record ice‐flow direction changes with time. |
format |
Article in Journal/Newspaper |
author |
SYVERSON, KENT M. |
spellingShingle |
SYVERSON, KENT M. The ability of ice‐flow indicators to record complex, historic deglaciation events, Burroughs Glacier, Alaska |
author_facet |
SYVERSON, KENT M. |
author_sort |
SYVERSON, KENT M. |
title |
The ability of ice‐flow indicators to record complex, historic deglaciation events, Burroughs Glacier, Alaska |
title_short |
The ability of ice‐flow indicators to record complex, historic deglaciation events, Burroughs Glacier, Alaska |
title_full |
The ability of ice‐flow indicators to record complex, historic deglaciation events, Burroughs Glacier, Alaska |
title_fullStr |
The ability of ice‐flow indicators to record complex, historic deglaciation events, Burroughs Glacier, Alaska |
title_full_unstemmed |
The ability of ice‐flow indicators to record complex, historic deglaciation events, Burroughs Glacier, Alaska |
title_sort |
ability of ice‐flow indicators to record complex, historic deglaciation events, burroughs glacier, alaska |
publisher |
Wiley |
publishDate |
1995 |
url |
http://dx.doi.org/10.1111/j.1502-3885.1995.tb00776.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1995.tb00776.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1995.tb00776.x |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_source |
Boreas volume 24, issue 3, page 232-244 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.1995.tb00776.x |
container_title |
Boreas |
container_volume |
24 |
container_issue |
3 |
container_start_page |
232 |
op_container_end_page |
244 |
_version_ |
1800752031911116800 |