
Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska.
Canadian Journal of Earth Sciences
By: N.D. Naeser, J.A. Westgate, O.L. Hughes, and T.L. Pewe
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Abstract
Six distal tephra beds from the Yukon Territory and Alaska were dated by the fission-track method. Assuming that no track fading has occurred in the glass, Old Crow and Dawson tephra beds are <120 000 and <52 000 yr old, respectively. Mosquito Gulch tephra is 1.22 m.y. old, Fort Selkirk tephra is approx 1 m.y. old, the Ester ash bed is 0.45 m.y. old, and the best estimate of the age of Lost Chicken tephra is in the range 1.7-2.6 m.y. It is concluded that application of the fission-track method to distal tephra, in conjunction with detailed characterization studies, offers great potential for elucidation of the Late Cainozoic geological history of Alaska and the Yukon Territory. -P.Br.
Additional publication details
Publication type | Article |
---|---|
Publication Subtype | Journal Article |
Title | Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska. |
Series title | Canadian Journal of Earth Sciences |
Volume | 19 |
Issue | 11 |
Year Published | 1982 |
Language | English |
Larger Work Type | Article |
Larger Work Subtype | Journal Article |
Larger Work Title | Canadian Journal of Earth Sciences |
First page | 2167 |
Last page | 2178 |