Sediment record of short‐lived ice‐contact lakes, Burroughs Glacier, Alaska
Sediments deposited in two small ice‐contact lakes with low rates of sediment input have been studied in subaerial exposures. Sediment characteristics are a function of the water source (glacial meltwater versus non‐meltwater), proximity to the glacier margin and lake shore, amount of supraglacial d...
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crwiley:10.1111/j.1502-3885.1998.tb00866.x 2024-06-02T08:07:01+00:00 Sediment record of short‐lived ice‐contact lakes, Burroughs Glacier, Alaska SYVERSON, KENT M. 1998 http://dx.doi.org/10.1111/j.1502-3885.1998.tb00866.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1998.tb00866.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1998.tb00866.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 27, issue 1, page 44-54 ISSN 0300-9483 1502-3885 journal-article 1998 crwiley https://doi.org/10.1111/j.1502-3885.1998.tb00866.x 2024-05-03T10:51:37Z Sediments deposited in two small ice‐contact lakes with low rates of sediment input have been studied in subaerial exposures. Sediment characteristics are a function of the water source (glacial meltwater versus non‐meltwater), proximity to the glacier margin and lake shore, amount of supraglacial debris, and lake duration. Calving Lake expanded (and later partially drained) as a calving ice margin retreated. Nearshore deltas contain 1 × 10 5 m 3 stratified sand and gravel deposited at rates up to 1 m/yr during a 9‐yr interval. Deltaic sediment contains types A and B ripple‐drift cross‐lamination, draped lamination, and scour surfaces caused by variations in water‐flow velocity and the amount of sediment settling from suspension. Most water inflow came from non‐subglacial meltwater sources and was sediment‐poor, so overflow and interflow sedimentation processes dominated the offshore environment. Offshore sediment generally contains massive silt or silt interbedded with fine‐grained sand deposited at rates of 1.3‐1.5 cm/yr. Iceberg gravity craters observed on the lake plain were formed when icebergs impacted the lake floor during calving events. In Bruce Hills Lake, proximity to glacier ice and the presence of supraglacial sediment formed coarsening‐upward successions when debris fell directly from an ice ledge onto silty lacustrine sediment. Article in Journal/Newspaper glacier Alaska Wiley Online Library Ice Ledge ENVELOPE(-55.298,-55.298,49.550,49.550) Boreas 27 1 44 54 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Sediments deposited in two small ice‐contact lakes with low rates of sediment input have been studied in subaerial exposures. Sediment characteristics are a function of the water source (glacial meltwater versus non‐meltwater), proximity to the glacier margin and lake shore, amount of supraglacial debris, and lake duration. Calving Lake expanded (and later partially drained) as a calving ice margin retreated. Nearshore deltas contain 1 × 10 5 m 3 stratified sand and gravel deposited at rates up to 1 m/yr during a 9‐yr interval. Deltaic sediment contains types A and B ripple‐drift cross‐lamination, draped lamination, and scour surfaces caused by variations in water‐flow velocity and the amount of sediment settling from suspension. Most water inflow came from non‐subglacial meltwater sources and was sediment‐poor, so overflow and interflow sedimentation processes dominated the offshore environment. Offshore sediment generally contains massive silt or silt interbedded with fine‐grained sand deposited at rates of 1.3‐1.5 cm/yr. Iceberg gravity craters observed on the lake plain were formed when icebergs impacted the lake floor during calving events. In Bruce Hills Lake, proximity to glacier ice and the presence of supraglacial sediment formed coarsening‐upward successions when debris fell directly from an ice ledge onto silty lacustrine sediment. |
format |
Article in Journal/Newspaper |
author |
SYVERSON, KENT M. |
spellingShingle |
SYVERSON, KENT M. Sediment record of short‐lived ice‐contact lakes, Burroughs Glacier, Alaska |
author_facet |
SYVERSON, KENT M. |
author_sort |
SYVERSON, KENT M. |
title |
Sediment record of short‐lived ice‐contact lakes, Burroughs Glacier, Alaska |
title_short |
Sediment record of short‐lived ice‐contact lakes, Burroughs Glacier, Alaska |
title_full |
Sediment record of short‐lived ice‐contact lakes, Burroughs Glacier, Alaska |
title_fullStr |
Sediment record of short‐lived ice‐contact lakes, Burroughs Glacier, Alaska |
title_full_unstemmed |
Sediment record of short‐lived ice‐contact lakes, Burroughs Glacier, Alaska |
title_sort |
sediment record of short‐lived ice‐contact lakes, burroughs glacier, alaska |
publisher |
Wiley |
publishDate |
1998 |
url |
http://dx.doi.org/10.1111/j.1502-3885.1998.tb00866.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1998.tb00866.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1998.tb00866.x |
long_lat |
ENVELOPE(-55.298,-55.298,49.550,49.550) |
geographic |
Ice Ledge |
geographic_facet |
Ice Ledge |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_source |
Boreas volume 27, issue 1, page 44-54 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.1998.tb00866.x |
container_title |
Boreas |
container_volume |
27 |
container_issue |
1 |
container_start_page |
44 |
op_container_end_page |
54 |
_version_ |
1800752031723421696 |