Sample: UA69

Sample ID:	UA69 ^[1] ^[2] ^[3] ^[4] ^[5]
Station ID:	UA69
AT Num:
Volcano:
Possible source:	Emmons Lake Volcanic Center
Eruption:	Emmons Lake Volcanic Center C2
Collector:	Harington, C. R.
Date sampled:
Sample type 1:	Tephra Fall
Color:	whitish
Final unit:
Text Description:	Maximum thickness of 22 cm; consists of thin, bubble-wall shards. Orthopyroxene, plagioclase, magnetite, and ilmenite are relatively abundant in the small crystal component, which also contains minor amounts of clinopyroxene, apatite, and zircon. From Preece et al. (2011): 22 cm thick; bubble-wall shards, trace amounts of brown glass; in grey clay and silt overlying gravel; 1.2 m above gravel; field name CR67-44.
Sample Location:

References Cited

[1] Dawson Tephra: a prominent stratigraphic marker of late Wisconsinan age in west-central Yukon, Canada, 2000

Westgate, J. A., Preece, S. J., Kotler, Erica, and Hall, Sheila, 2000, Dawson Tephra: a prominent stratigraphic marker of late Wisconsinan age in west-central Yukon, Canada: Canadian Journal of Earth Sciences, v. 37, n. 4, p. 621-627.

[2] Characterization, identity, distribution, and source of late Cenozoic tephra beds in the Klondike District of the Yukon, Canada, 2000

Preece, S. J., Westgate, J. A., Alloway, B. V., and Milner, M. W., 2000, Characterization, identity, distribution, and source of late Cenozoic tephra beds in the Klondike District of the Yukon, Canada: Canadian Journal of Earth Sciences, v. 37, n. 7, p. 983-996.

[3] Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska, 1982

Naeser, N. D., Westgate, J. A., Hughes, O. L., and Pewe, T. L., 1982, Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska: Canadian Journal of Earth Sciences [Journal Canadien des Sciences de la Terre], v. 19, n. 11, p. 2167-2178.

[4] A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory, 2011

Preece, S.J., Westgate, J.A., Froese, D.G., Pearce, N.J.G., and Perkins, W.T., 2011, A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory: Canadian Journal of Earth Sciences, v. 48, p. 1386-1418, doi: 10.1139/e10-110

[5] Old Crow tephra across eastern Beringia: a single cataclysmic eruption at the close of Marine Isotope Stage 6, 2011

Preece, S.J., Pearce, N.J.G., Westgate, J.A., Froese, D.G., Jensen, B.J.L., and 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, v. 30, p. 2069-2099, doi:10.1016/j.quascirev.2010.04.020 .