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Sample: UT817

Sample ID: UT817 [1] [2] [3]
Station ID: Halfway_House
AT Num:
Volcano:
Possible source:
Eruption:
Collector: Preece, S. J.
Date sampled:
Sample type 1: Tephra Fall
Color: white to gray
Final unit:
Text Description: UT817 and UT816 form a layered tephra 1.5 m higher than the underlying SD tephra of Preece et al. (1999). It is as thick as 5 cm and, with a discontinuous basal white bed (UT816, 2.5Y8/1)that has a diffuse contact with the overlying gray unit and reworked gray tephra (UT817, ~2.5Y6/1). The tephra is interbedded with massive gray (5Y6/2) silt with small oxidation blebs and occurs in pods with sharp and irregular lower contacts with the underlying silt and diffuse contacts with the overlying loess. However, the white-gray contact is sharp in some areas and the two are separated in places. The average pod thickness is 3 to 5 cm.
Sample Location:

References Cited

[1] Tephrostratigraphy of the late Cenozoic Gold Hill loess, Fairbanks area, Alaska, 1991

Preece, S. J., 1991, Tephrostratigraphy of the late Cenozoic Gold Hill loess, Fairbanks area, Alaska: University of Toronto (Canada) M.S. thesis, 186 p.

[2] Tephrochronology of late Cenozoic loess at Fairbanks, central Alaska, 1999

Preece, S. J., Westgate, J. A., Stemper, B. A., and Pewe, T. L., 1999, Tephrochronology of late Cenozoic loess at Fairbanks, central Alaska: Geological Society of America Bulletin, v. 111, n. 1, p. 71-90.

[3] Late Pliocene Dawson Cut forest bed and new tephrochronological findings in the Gold Hill Loess, east-central Alaska, 2009

Pewe, T.L., Westgate, J.A., Preece, S.J., Brown, P.M., and Leavitt, S.W., 2009, Late Pliocene Dawson Cut forest bed and new tephrochronological findings in the Gold Hill Loess, east-central Alaska: Geological Society of America Bulletin, v. 121, n. 1-2, p. 294-320, doi: 10.1130/B26323.1 .