Sample: UT1

Sample ID:	UT1 ^[1] ^[2] ^[3] ^[4] ^[5] ^[6] ^[7] ^[8]
Station ID:	HH-62-228
AT Num:
Volcano:
Possible source:
Eruption:	Old Crow Tephra
Collector:	Westgate, J. A.
Date sampled:
Sample type 1:	Tephra Fall
Color:
Final unit:
Text Description:	The tephra occurs in cryogenically deformed, late-Pleistocene fluvial deposits located below the glaciolacustrine silt and clay that form a conspicuous, dark, recessive unit close to the top of the bluff. Tephra has reworked thickness of 5 to 10 cm and occurs within fine-grained, peaty floodplain deposits. Tephra continuity is disrupted by large ice-wedge casts whose infilling commonly contains small pockets of the tephra (See Figs. 4B and 5 in Westgate and others, 1983). Channel gravel and sand underlie the tephra-bearing sediments and these in turn unconformably overlie fluvial and lacustrine sediments of probable middle or early Pleistocene age (Pearce and others, 1982).
Sample Location:

References Cited

[1] Old Crow tephra: a new late Pleistocene stratigraphic marker across North-central Alaska and western Yukon Territory, 1983

Westgate, J. A., Hamilton, T. D., and Gorton, M. P., 1983, Old Crow tephra: a new late Pleistocene stratigraphic marker across North-central Alaska and western Yukon Territory: Quaternary Research, v. 19, n. 1, p. 38-54.

[2] 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.

[3] Discovery of a large-magnitude, late Pleistocene volcanic eruption in Alaska, 1982

Westgate, J. A., 1982, Discovery of a large-magnitude, late Pleistocene volcanic eruption in Alaska: Science, v. 218, n. 4574, p. 789-790.

[4] Correlation techniques in tephra studies, 1981

Westgate, J. A., and Gorton, M. P., 1981, Correlation techniques in tephra studies: in Self, S. and Sparks, R. S. J., Tephra studies: proceedings of the NATO Advanced Study Institute "Tephra studies as a tool in Quaternary research", NATO Advanced Study Institutes Series C 0075, p. 73-94.

[5] A contribution to the Pleistocene geochronology of Alaska and the Yukon Territory: fission-track age of distal tephra units, 1978

Briggs, N. D., and Westgate, J. A., 1978, A contribution to the Pleistocene geochronology of Alaska and the Yukon Territory: fission-track age of distal tephra units: in Short papers of the fourth international conference, geochronology, cosmochronology, isotope geology, 1978, U.S. Geological Survey Open-File Report 78-0701, p. 49-52.

[6] Quaternary geology and late-Quaternary environments of the Holitna Lowland and Chuilnuk-Kiokluk Mountains region, interior southwestern Alaska, 1990

Waythomas, C. F., 1990, Quaternary geology and late-Quaternary environments of the Holitna Lowland and Chuilnuk-Kiokluk Mountains region, interior southwestern Alaska: University of Colorado Ph.D. dissertation, 305 p.

[7] 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

[8] 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 .

Alaska Volcano Observatory