Holocene glacier fluctuations inferred from lacustrine sediment, Emerald Lake, Kenai Peninsula, Alaska
Physical and biological characteristics of lacustrine sediment from Emerald Lake were used to reconstruct the Holocene glacier history of Grewingk Glacier, southern Alaska. Emerald Lake is an ice-marginal threshold lake, receiving glaciofluvial sediment when Grewingk Glacier overtops the topographic...
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Online Access: | http://dx.doi.org/10.1016/j.yqres.2015.11.004 http://api.elsevier.com/content/article/PII:S003358941500112X?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S003358941500112X?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400000417 |
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crcambridgeupr:10.1016/j.yqres.2015.11.004 2024-06-09T07:46:06+00:00 Holocene glacier fluctuations inferred from lacustrine sediment, Emerald Lake, Kenai Peninsula, Alaska LaBrecque, Taylor S. Kaufman, Darrell S. National Science Foundation Geological Society of America 2016 http://dx.doi.org/10.1016/j.yqres.2015.11.004 http://api.elsevier.com/content/article/PII:S003358941500112X?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S003358941500112X?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400000417 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms http://www.elsevier.com/tdm/userlicense/1.0/ Quaternary Research volume 85, issue 1, page 34-43 ISSN 0033-5894 1096-0287 journal-article 2016 crcambridgeupr https://doi.org/10.1016/j.yqres.2015.11.004 2024-05-15T12:58:48Z Physical and biological characteristics of lacustrine sediment from Emerald Lake were used to reconstruct the Holocene glacier history of Grewingk Glacier, southern Alaska. Emerald Lake is an ice-marginal threshold lake, receiving glaciofluvial sediment when Grewingk Glacier overtops the topographic divide that separates it from the lake. Sub-bottom acoustical profiles were used to locate core sites to maximize both the length and resolution of the sedimentary sequence recovered in the 4-m-long cores. The age model for the composite sequence is based on 13 14 C ages and a 210 Pb profile. A sharp transition from the basal inorganic mud to organic-rich mud at 11.4 ± 0.2 ka marks the initial retreat of Grewingk Glacier below the divide of Emerald Lake. The overlaying organic-rich mud is interrupted by stony mud that records a re-advance between 10.7 ± 0.2 and 9.8 ± 0.2 ka. The glacier did not spill meltwater into the lake again until the Little Ice Age, consistent with previously documented Little Ice Ages advances on the Kenai Peninsula. The retreat of Grewingk Glacier at 11.4 ka took place as temperature increased following the Younger Dryas, and the subsequent re-advance corresponds with a climate reversal beginning around 11 ka across southern Alaska. Article in Journal/Newspaper glacier Alaska Cambridge University Press Quaternary Research 85 1 34 43 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Physical and biological characteristics of lacustrine sediment from Emerald Lake were used to reconstruct the Holocene glacier history of Grewingk Glacier, southern Alaska. Emerald Lake is an ice-marginal threshold lake, receiving glaciofluvial sediment when Grewingk Glacier overtops the topographic divide that separates it from the lake. Sub-bottom acoustical profiles were used to locate core sites to maximize both the length and resolution of the sedimentary sequence recovered in the 4-m-long cores. The age model for the composite sequence is based on 13 14 C ages and a 210 Pb profile. A sharp transition from the basal inorganic mud to organic-rich mud at 11.4 ± 0.2 ka marks the initial retreat of Grewingk Glacier below the divide of Emerald Lake. The overlaying organic-rich mud is interrupted by stony mud that records a re-advance between 10.7 ± 0.2 and 9.8 ± 0.2 ka. The glacier did not spill meltwater into the lake again until the Little Ice Age, consistent with previously documented Little Ice Ages advances on the Kenai Peninsula. The retreat of Grewingk Glacier at 11.4 ka took place as temperature increased following the Younger Dryas, and the subsequent re-advance corresponds with a climate reversal beginning around 11 ka across southern Alaska. |
author2 |
National Science Foundation Geological Society of America |
format |
Article in Journal/Newspaper |
author |
LaBrecque, Taylor S. Kaufman, Darrell S. |
spellingShingle |
LaBrecque, Taylor S. Kaufman, Darrell S. Holocene glacier fluctuations inferred from lacustrine sediment, Emerald Lake, Kenai Peninsula, Alaska |
author_facet |
LaBrecque, Taylor S. Kaufman, Darrell S. |
author_sort |
LaBrecque, Taylor S. |
title |
Holocene glacier fluctuations inferred from lacustrine sediment, Emerald Lake, Kenai Peninsula, Alaska |
title_short |
Holocene glacier fluctuations inferred from lacustrine sediment, Emerald Lake, Kenai Peninsula, Alaska |
title_full |
Holocene glacier fluctuations inferred from lacustrine sediment, Emerald Lake, Kenai Peninsula, Alaska |
title_fullStr |
Holocene glacier fluctuations inferred from lacustrine sediment, Emerald Lake, Kenai Peninsula, Alaska |
title_full_unstemmed |
Holocene glacier fluctuations inferred from lacustrine sediment, Emerald Lake, Kenai Peninsula, Alaska |
title_sort |
holocene glacier fluctuations inferred from lacustrine sediment, emerald lake, kenai peninsula, alaska |
publisher |
Cambridge University Press (CUP) |
publishDate |
2016 |
url |
http://dx.doi.org/10.1016/j.yqres.2015.11.004 http://api.elsevier.com/content/article/PII:S003358941500112X?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S003358941500112X?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400000417 |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_source |
Quaternary Research volume 85, issue 1, page 34-43 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms http://www.elsevier.com/tdm/userlicense/1.0/ |
op_doi |
https://doi.org/10.1016/j.yqres.2015.11.004 |
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Quaternary Research |
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85 |
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1 |
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34 |
op_container_end_page |
43 |
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1801375869044785152 |