Old Crow Tephra Found at the Palisades of the Yukon, Alaska

Abstract A 20-cm-thick volcanic ash layer at the Palisades along the Yukon River is geochemically correlated with the Old Crow tephra. A buried organic and wood-rich layer above the Old Crow tephra probably records the last interglaciation. The recognition of the Old Crow tephra provides the first c...

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Bibliographic Details
Published in:Quaternary Research
Main Authors: Begét, James, Edwards, Mary, Hopkins, David, Keskinen, Mary, Kukla, George
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1991
Subjects:
Yukon
Palisades
The Palisades
Old Crow
Yukon river
Alaska
Online Access:http://dx.doi.org/10.1016/0033-5894(91)90074-f
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Description
Summary:Abstract A 20-cm-thick volcanic ash layer at the Palisades along the Yukon River is geochemically correlated with the Old Crow tephra. A buried organic and wood-rich layer above the Old Crow tephra probably records the last interglaciation. The recognition of the Old Crow tephra provides the first chronologic information on the age of the thick sequence of Pleistocene sediments at the Palisades, an important ice-age mammal site in central Alaska and a key locality for the reconstruction of the history of the Yukon River and the last interglaciation in central Alaska.

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