Britta J.L. Jensen
Duane G. Froese
Kristi L. Wallace
Lauren J. Davies
2016
<div id="preview-section-abstract"><div id="abstracts" class="Abstracts u-font-serif"><div id="abs0010" class="abstract author" lang="en"><div id="abssec0010"><div id="abspara0010" class="u-margin-s-bottom"><span>The Aleutian Arc-Alaska Peninsula and Wrangell volcanic field are the main source areas for <a class="topic-link" title="Learn more about tephra from ScienceDirect's AI-generated Topic Pages" href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/tephra" data-mce-href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/tephra">tephra</a> deposits found across Alaska and northern Canada, and increasingly, <a class="topic-link" title="Learn more about tephra from ScienceDirect's AI-generated Topic Pages" href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/tephra" data-mce-href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/tephra">tephra</a> from these eruptions have been found further afield in North America, Greenland, and Europe. However, there have been no broad scale reviews of the </span><a class="topic-link" title="Learn more about Late Pleistocene from ScienceDirect's AI-generated Topic Pages" href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/late-pleistocene" data-mce-href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/late-pleistocene">Late Pleistocene</a><span> and <a class="topic-link" title="Learn more about Holocene from ScienceDirect's AI-generated Topic Pages" href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/holocene" data-mce-href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/holocene">Holocene</a> tephrostratigraphy for this region since the 1980s, and this lack of data is hindering progress in identifying these tephra both locally and regionally. To address this gap and the variable quality of associated geochemical and chronological data, we undertake a detailed review of the latest Pleistocene to <a class="topic-link" title="Learn more about Holocene from ScienceDirect's AI-generated Topic Pages" href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/holocene" data-mce-href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/holocene">Holocene</a> tephra found in interior Alaska and Yukon. This paper discusses nineteen tephra that have distributions beyond southwest Alaska and that have the potential to become, or already are, important regional markers. This includes three ‘modern’ events from the 20th century, ten with limited data availability but potentially broad distributions, and six that are widely reported in interior Alaska and Yukon. Each tephra is assessed in terms of chronology, <a class="topic-link" title="Learn more about geochemistry from ScienceDirect's AI-generated Topic Pages" href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/geochemistry" data-mce-href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/geochemistry">geochemistry</a> and distribution, with new Bayesian age estimates and geochemical data when possible. This includes new major-element geochemical data for Crater Peak 1992, Redoubt 1989–90, and two andesitic tephra from St Michael Island (Tephra D), as well as revised age estimates for Dawson tephra, Oshetna, Hayes set H, Aniakchak CFE II, and the White River Ashes, northern and eastern lobes.</span></div></div></div></div></div>
application/pdf
10.1016/j.quascirev.2016.05.026
en
Elsevier
Late Pleistocene and Holocene tephrostratigraphy of interior Alaska and Yukon: Key beds and chronologies over the past 30,000 years
article