Home
Volcanoes
Webcams
News
Explore Data
Images
Get Involved
About AVO

Sample: UT804

Sample ID: UT804 [1] [2] [3]
Station ID: Gold_Hill_III
AT Num:
Volcano:
Possible source:
Eruption:
Collector: Preece, S. J.
Date sampled:
Sample type 1: Tephra Fall
Color: white
Final unit:
Text Description: Coarse and medium sand-sized white tephra with abundant mafic minerals and charcoal flecks. Interbedded with 2.5Y6/2 and 10YR5/4 silt and organic bands that are intensely soliflucted. Primary stratigraphic context, although deformed by solifluction so that ash horizons repeat vertically over a 65 cm interval. Lenses of ash have a maximum thickness of 3.5 cm and are composed of smaller lenses with a maximum thickness of 1.2 cm, separated by loess stringers. Lenses are usually isolated, but sometimes linked by mm thick wisps of tephra. Distinct ash-loess contacts that undulate with some localized shearing. Mafic minerals and charcoal form dark clusters in the ash that do not have any particular orientation.
Sample Location:
MarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarker
Legend
✕
Red (Warning)
Orange (Watch)
Yellow (Advisory)
Green (Normal)
Uninstrumented

300 km
200 mi
Leaflet U.S. Department of the Interior | U.S. Geological Survey | Policies

References Cited

[1] Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex, 1997

Preece, S. J., 1997, Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex: Miami University (Ohio) unpublished Ph.D. dissertation, 547 p.

[2] 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.

[3] 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.