Emmons Lake Volcanic Center, Alaska Peninsula: source of the Late Wisconsin Dawson tephra, Yukon Territory, Canada
The Emmons Lake Volcanic Center on the Alaska Peninsula of southwestern Alaska is the site of at least two rhyolitic caldera-forming eruptions (C1 and C2) of late Quaternary age that are possibly the largest of the numerous caldera-forming eruptions known in the Aleutian arc. The deposits produced b...
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crcansciencepubl:10.1139/e03-026 2024-04-07T07:51:30+00:00 Emmons Lake Volcanic Center, Alaska Peninsula: source of the Late Wisconsin Dawson tephra, Yukon Territory, Canada Mangan, Margaret T Waythomas, Christopher F Miller, Thomas P Trusdell, Frank A 2003 http://dx.doi.org/10.1139/e03-026 http://www.nrcresearchpress.com/doi/pdf/10.1139/e03-026 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 40, issue 7, page 925-936 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2003 crcansciencepubl https://doi.org/10.1139/e03-026 2024-03-08T00:37:42Z The Emmons Lake Volcanic Center on the Alaska Peninsula of southwestern Alaska is the site of at least two rhyolitic caldera-forming eruptions (C1 and C2) of late Quaternary age that are possibly the largest of the numerous caldera-forming eruptions known in the Aleutian arc. The deposits produced by these eruptions are widespread (eruptive volumes of >50 km 3 each), and their association with Quaternary glacial and eolian deposits on the Alaska Peninsula and elsewhere in Alaska and northwestern Canada enhances the likelihood of establishing geochronological control on Quaternary stratigraphic records in this region. The pyroclastic deposits associated with the second caldera-forming eruption (C2) consist of loose, granular, airfall and pumice-flow deposits that extend for tens of kilometres beyond Emmons Lake caldera, reaching both the Bering Sea and Pacific Ocean coastlines north and south of the caldera. Geochronological and compositional data on C2 deposits indicate a correlation with the Dawson tephra, a 24 000 14 C BP (27 000 calibrated years BP), widespread bed of silicic ash found in loess deposits in west-central Yukon Territory, Canada. The correlation clearly establishes the Dawson tephra as the time-stratigraphic marker of the last glacial maximum. Article in Journal/Newspaper Bering Sea Dawson Alaska Yukon Canadian Science Publishing Yukon Bering Sea Canada Pacific Canadian Journal of Earth Sciences 40 7 925 936 |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
topic |
General Earth and Planetary Sciences |
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General Earth and Planetary Sciences Mangan, Margaret T Waythomas, Christopher F Miller, Thomas P Trusdell, Frank A Emmons Lake Volcanic Center, Alaska Peninsula: source of the Late Wisconsin Dawson tephra, Yukon Territory, Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
The Emmons Lake Volcanic Center on the Alaska Peninsula of southwestern Alaska is the site of at least two rhyolitic caldera-forming eruptions (C1 and C2) of late Quaternary age that are possibly the largest of the numerous caldera-forming eruptions known in the Aleutian arc. The deposits produced by these eruptions are widespread (eruptive volumes of >50 km 3 each), and their association with Quaternary glacial and eolian deposits on the Alaska Peninsula and elsewhere in Alaska and northwestern Canada enhances the likelihood of establishing geochronological control on Quaternary stratigraphic records in this region. The pyroclastic deposits associated with the second caldera-forming eruption (C2) consist of loose, granular, airfall and pumice-flow deposits that extend for tens of kilometres beyond Emmons Lake caldera, reaching both the Bering Sea and Pacific Ocean coastlines north and south of the caldera. Geochronological and compositional data on C2 deposits indicate a correlation with the Dawson tephra, a 24 000 14 C BP (27 000 calibrated years BP), widespread bed of silicic ash found in loess deposits in west-central Yukon Territory, Canada. The correlation clearly establishes the Dawson tephra as the time-stratigraphic marker of the last glacial maximum. |
format |
Article in Journal/Newspaper |
author |
Mangan, Margaret T Waythomas, Christopher F Miller, Thomas P Trusdell, Frank A |
author_facet |
Mangan, Margaret T Waythomas, Christopher F Miller, Thomas P Trusdell, Frank A |
author_sort |
Mangan, Margaret T |
title |
Emmons Lake Volcanic Center, Alaska Peninsula: source of the Late Wisconsin Dawson tephra, Yukon Territory, Canada |
title_short |
Emmons Lake Volcanic Center, Alaska Peninsula: source of the Late Wisconsin Dawson tephra, Yukon Territory, Canada |
title_full |
Emmons Lake Volcanic Center, Alaska Peninsula: source of the Late Wisconsin Dawson tephra, Yukon Territory, Canada |
title_fullStr |
Emmons Lake Volcanic Center, Alaska Peninsula: source of the Late Wisconsin Dawson tephra, Yukon Territory, Canada |
title_full_unstemmed |
Emmons Lake Volcanic Center, Alaska Peninsula: source of the Late Wisconsin Dawson tephra, Yukon Territory, Canada |
title_sort |
emmons lake volcanic center, alaska peninsula: source of the late wisconsin dawson tephra, yukon territory, canada |
publisher |
Canadian Science Publishing |
publishDate |
2003 |
url |
http://dx.doi.org/10.1139/e03-026 http://www.nrcresearchpress.com/doi/pdf/10.1139/e03-026 |
geographic |
Yukon Bering Sea Canada Pacific |
geographic_facet |
Yukon Bering Sea Canada Pacific |
genre |
Bering Sea Dawson Alaska Yukon |
genre_facet |
Bering Sea Dawson Alaska Yukon |
op_source |
Canadian Journal of Earth Sciences volume 40, issue 7, page 925-936 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e03-026 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
40 |
container_issue |
7 |
container_start_page |
925 |
op_container_end_page |
936 |
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1795666474899079168 |