Sample: UA1056


Sample ID: UA1056 [1] [2]
Station ID: UA1056
AT Num:
Volcano:
Possible source: Emmons Lake Volcanic Center
Eruption: Emmons Lake Volcanic Center C2
Collector: Westgate, J. A.
Date sampled:
Sample type 1: Tephra Fall
Color:
Final unit:
Text Description: 25-cm-thick-tephra; consists of thin, bubble-wall shards. Orthopyroxene, plagioclase, magnetite, and ilmenite are relatively abundant in the small crystal component, which also contains minor amounts of clinopyroxene, apatite, and zircon. Deformed, normally graded vitric beds; sharply defined basal contact with underlying loess. Lowermost 20 cm of tephra is very pure, the uppermost 5 cm consists of reworked tephra and loess.
Sample Location:

References Cited

[1] Dawson Tephra: a prominent stratigraphic marker of late Wisconsinan age in west-central Yukon, Canada, 2000

Westgate, J. A., Preece, S. J., Kotler, Erica, and Hall, Sheila, 2000, Dawson Tephra: a prominent stratigraphic marker of late Wisconsinan age in west-central Yukon, Canada: Canadian Journal of Earth Sciences, v. 37, n. 4, p. 621-627.

[2] Tephrochronology of middle to late Pleistocene loess in east-central Alaska, 2007

Jensen, B.J.L., 2007, Tephrochronology of Middle to Late Pleistocene Loess in Eastcentral Alaska: University of Alberta M.S. thesis, 120 p.