Home
Volcanoes
Webcams
News
Explore Data
Images
Get Involved
About AVO

Sample: UT861

Sample ID: UT861 [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: white
Final unit:
Text Description: Oldest tephra at this section; occurs as powdery white pods up to 4.6-5 cm thick, but generally about 2 cm thick, that repeat vertically over a 10 cm interval. Pods are partially oxidized and interbedded with massive, grey (2.5Y7/2), well-consolidated silt that is mottled with orange-white oxidation patches. Generally sharp, undulating base that locally may be diffuse; upper contact that is very irregular and either sharp or interfingering with the surrounding loess. Charcoal flecks are present in the tephra, but there are few crystals. Slightly coarser ash with some crystals occurs at the base of a few 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 .