| 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. |
| Genre: | Article |
| ProdID: | 70011829 |
| Citation Author: | Naeser, N. D.; Westgate, J. A.; Hughes, O. L.; Pewe, T. L. |
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| Citation End Page: | 2178 |
| Citation Issue: | 11 |
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| Citation Language: | English |
| Citation Larger Work Title: | Canadian Journal of Earth Sciences |
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| Citation Number Of Pages: | 12 |
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| Citation Search Results Text: | Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska.; 1982; Article; Journal; Canadian Journal of Earth Sciences; Naeser, N. D.; Westgate, J. A.; Hughes, O. L.; Pewe, T. L. |
| Citation Start Page: | 2167 |
| Citation Volume: | 19 |
| Citation Year: | 1982 |
| Type: | citation/reference |
| Text: | Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska.; 1982; Article; Journal; Canadian Journal of Earth Sciences; Naeser, N. D.; Westgate, J. A.; Hughes, O. L.; Pewe, T. L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1982 00:00 -0600 |
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