Old Crow tephra across eastern Beringia: a single cataclysmic eruption at the close of Marine Isotope Stage 6

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dc.contributor.author Preece, S. J.
dc.contributor.author Pearce, N. J. G.
dc.contributor.author Westgate, J. A.
dc.contributor.author Froese, D. G.
dc.contributor.author Jensen, B. J. L.
dc.contributor.author Perkins, W. T.
dc.date.accessioned 2011-10-25T11:57:43Z
dc.date.available 2011-10-25T11:57:43Z
dc.date.issued 2011-10-25
dc.identifier.citation Preece , S J , Pearce , N J G , Westgate , J A , Froese , D G , Jensen , B J L & Perkins , W T 2011 , ' Old Crow tephra across eastern Beringia: a single cataclysmic eruption at the close of Marine Isotope Stage 6 ' Quaternary Science Review , vol 30 , no. 17-18 , pp. 17-18 . en
dc.identifier.issn 0277-3791
dc.identifier.other PURE: 172000
dc.identifier.other dspace: 2160/7624
dc.identifier.uri http://hdl.handle.net/2160/7624
dc.description Preece, S. J., Pearce, J. J. G., Westgate, J. A., Froese, D. G., Jensen, B. J. L., Perkins, W. T. (2011). Old Crow tephra across eastern Beringia: a single cataclysmic eruption at the close of Marine Isotope Stage 6. Quaternary Science Reviews, 30 (17-18), 2069-2090 (Special Issue). en
dc.description.abstract Old Crow tephra is the largest and most widespread Quaternary eruption presently known in eastern Beringia. Its major- and trace-element geochemistry, Fe-Ti oxides, and stratigraphic and paleoecological context indicate that it is the result of a single cataclysmic eruption. The proximal region may well have experienced tephra fallout from small eruptions just prior to or after the Old Crow event, but there is no evidence to indicate that the distal area was affected. We recalculate the glass fission-track age at 124 +/- 10 ka, which, coupled with stratigraphic and paleoenvironmental reconstructions, indicates that deposition occurred prior to development of the last interglacial boreal forest, which suggests a latest Marine Isotope Stage (MIS) 6 age. The bulk tephra volume erupted is estimated by three different approaches, that are in broad agreement at similar to 200 km(3), but this result must be considered as tentative given the poor controls on definition of isopachs over such a large area. The source caldera, although presently unrecognized, is located in the eastern Aleutian arc, possibly at or near the Emmons Lake volcanic center. (C) 2010 Elsevier Ltd. All rights reserved. en
dc.format.extent 2 en
dc.language.iso eng
dc.relation.ispartof Quaternary Science Review en
dc.title Old Crow tephra across eastern Beringia: a single cataclysmic eruption at the close of Marine Isotope Stage 6 en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.quascirev.2010.04.020
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Quaternary Environmental Change Group en
dc.description.status Peer reviewed en


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