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Sample: UT825

Sample ID: UT825 [1] [2] [3]
Station ID: Gold_Hill_I
AT Num:
Volcano:
Possible source:
Eruption:
Collector: Preece, S. J.
Date sampled:
Sample type 1: Tephra Fall
Color: gray
Final unit:
Text Description: Occurs about 6.5 m above the UT819 tephra at this location and 1 m above a thick soliflucted dark silt. The tephra is underlain by 5YR4/2, organic-rich silt with diffuse pseudo-bedding from solifluction and small oxidation nodules. The overlying loess is more compact, 5YR5/2, layered purple silt with oxidation stringers. Discontinuous basal 0.5-cm-thick bed of white tephra (UT826) covered by a 5.5-cm-thick gray tephra (UT825, 2.5Y6/1). Extremely powdery and subhorizontal, except where it has been locally soliflucted. Lower contact, color-contact, and upper contact are very sharp and undulating. Minor oxidation. Not internal structure other than the layering. Locally deformed into pods.
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 .