Late Quaternary distal tephra-fall deposits in lacustrine sediments, Kenai Peninsula, Alaska
Abstract Tephra-fall deposits from Cook Inlet volcanoes were detected in sediment cores from Tustumena and Paradox Lakes, Kenai Peninsula, Alaska, using magnetic susceptibility and petrography. The ages of tephra layers were estimated using 21 14 C ages on macrofossils. Tephras layers are typically...
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Cambridge University Press (CUP)
2007
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crcambridgeupr:10.1016/j.yqres.2007.03.006 2024-06-23T07:53:22+00:00 Late Quaternary distal tephra-fall deposits in lacustrine sediments, Kenai Peninsula, Alaska de Fontaine, Christian S. Kaufman, Darrell S. Scott Anderson, R. Werner, Al Waythomas, Christopher F. Brown, Thomas A. 2007 http://dx.doi.org/10.1016/j.yqres.2007.03.006 http://api.elsevier.com/content/article/PII:S0033589407000397?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589407000397?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400013983 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 68, issue 1, page 64-78 ISSN 0033-5894 1096-0287 journal-article 2007 crcambridgeupr https://doi.org/10.1016/j.yqres.2007.03.006 2024-06-12T04:05:08Z Abstract Tephra-fall deposits from Cook Inlet volcanoes were detected in sediment cores from Tustumena and Paradox Lakes, Kenai Peninsula, Alaska, using magnetic susceptibility and petrography. The ages of tephra layers were estimated using 21 14 C ages on macrofossils. Tephras layers are typically fine, gray ash, 1–5 mm thick, and composed of varying proportions of glass shards, pumice, and glass-coated phenocrysts. Of the two lakes, Paradox Lake contained a higher frequency of tephra (0.8 tephra/100 yr; 109 over the 13,200-yr record). The unusually large number of tephra in this lake relative to others previously studied in the area is attributed to the lake's physiography, sedimentology, and limnology. The frequency of ash fall was not constant through the Holocene. In Paradox Lake, tephra layers are absent between ca. 800–2200, 3800–4800, and 9000–10,300 cal yr BP, despite continuously layered lacustrine sediment. In contrast, between 5000 and 9000 cal yr BP, an average of 1.7 tephra layers are present per 100 yr. The peak period of tephra fall (7000–9000 cal yr BP; 2.6 tephra/100 yr) in Paradox Lake is consistent with the increase in volcanism between 7000 and 9000 yr ago recorded in the Greenland ice cores. Article in Journal/Newspaper Greenland Greenland ice cores Alaska Cambridge University Press Greenland Quaternary Research 68 1 64 78 |
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Cambridge University Press |
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crcambridgeupr |
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English |
description |
Abstract Tephra-fall deposits from Cook Inlet volcanoes were detected in sediment cores from Tustumena and Paradox Lakes, Kenai Peninsula, Alaska, using magnetic susceptibility and petrography. The ages of tephra layers were estimated using 21 14 C ages on macrofossils. Tephras layers are typically fine, gray ash, 1–5 mm thick, and composed of varying proportions of glass shards, pumice, and glass-coated phenocrysts. Of the two lakes, Paradox Lake contained a higher frequency of tephra (0.8 tephra/100 yr; 109 over the 13,200-yr record). The unusually large number of tephra in this lake relative to others previously studied in the area is attributed to the lake's physiography, sedimentology, and limnology. The frequency of ash fall was not constant through the Holocene. In Paradox Lake, tephra layers are absent between ca. 800–2200, 3800–4800, and 9000–10,300 cal yr BP, despite continuously layered lacustrine sediment. In contrast, between 5000 and 9000 cal yr BP, an average of 1.7 tephra layers are present per 100 yr. The peak period of tephra fall (7000–9000 cal yr BP; 2.6 tephra/100 yr) in Paradox Lake is consistent with the increase in volcanism between 7000 and 9000 yr ago recorded in the Greenland ice cores. |
format |
Article in Journal/Newspaper |
author |
de Fontaine, Christian S. Kaufman, Darrell S. Scott Anderson, R. Werner, Al Waythomas, Christopher F. Brown, Thomas A. |
spellingShingle |
de Fontaine, Christian S. Kaufman, Darrell S. Scott Anderson, R. Werner, Al Waythomas, Christopher F. Brown, Thomas A. Late Quaternary distal tephra-fall deposits in lacustrine sediments, Kenai Peninsula, Alaska |
author_facet |
de Fontaine, Christian S. Kaufman, Darrell S. Scott Anderson, R. Werner, Al Waythomas, Christopher F. Brown, Thomas A. |
author_sort |
de Fontaine, Christian S. |
title |
Late Quaternary distal tephra-fall deposits in lacustrine sediments, Kenai Peninsula, Alaska |
title_short |
Late Quaternary distal tephra-fall deposits in lacustrine sediments, Kenai Peninsula, Alaska |
title_full |
Late Quaternary distal tephra-fall deposits in lacustrine sediments, Kenai Peninsula, Alaska |
title_fullStr |
Late Quaternary distal tephra-fall deposits in lacustrine sediments, Kenai Peninsula, Alaska |
title_full_unstemmed |
Late Quaternary distal tephra-fall deposits in lacustrine sediments, Kenai Peninsula, Alaska |
title_sort |
late quaternary distal tephra-fall deposits in lacustrine sediments, kenai peninsula, alaska |
publisher |
Cambridge University Press (CUP) |
publishDate |
2007 |
url |
http://dx.doi.org/10.1016/j.yqres.2007.03.006 http://api.elsevier.com/content/article/PII:S0033589407000397?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589407000397?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400013983 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores Alaska |
genre_facet |
Greenland Greenland ice cores Alaska |
op_source |
Quaternary Research volume 68, issue 1, page 64-78 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2007.03.006 |
container_title |
Quaternary Research |
container_volume |
68 |
container_issue |
1 |
container_start_page |
64 |
op_container_end_page |
78 |
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1802644968683077632 |