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Sample: UT622

Sample ID: UT622 [1] [2] [3]
Station ID: CRH94
AT Num:
Volcano:
Possible source:
Eruption:
Collector: Westgate, J. A.
Date sampled:
Sample type 1: Tephra Fall
Color:
Final unit:
Text Description: Occurs as pods of tephra, up to 25 cm thick, within lacustrine or pond deposits of clayey silt to silty clay near the base of the section. Likely separated into pods as a result of loading into the underlying sediments, which must have been saturated and of low bulk density relative to the tephra when the latter was deposited. Pumiceous glass with sparse amounts of bubble-wall shards. Abundant hornblende (dark greenish-brown in color), hypersthene (more abundant in this than in Surprise Creek tephra), and plagioclase; Fe-Ti oxides and oxyhornblende are present but not conspicuous.
Sample Location:

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5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex: Miami University (Ohio) unpublished Ph.D. dissertation, 547 p.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] Tephrochronology, magnetostratigraphy and mammalian faunas of Middle and Early Pleistocene sediments at two sites on the Old Crow River, northern Yukon Territory, Canada, 2013

Westgate, J.A., Pearce, G.W., Preece, S.J., Schweger, C.E., Morlan, R.E., Pearce, N.J.G., and Perkins, T.W., 2013, Tephrochronology, magnetostratigraphy and mammalian faunas of Middle and Early Pleistocene sediments at two sites on the Old Crow River, northern Yukon Territory, Canada: Quaternary Research, v. 79, n. 1, p. 75-85.

[3] Trace-element analysis of volcanic glass shards by laser ablation inductively coupled plasma mass spectrometry: application to tephrochronological studies, 1994

Westgate, J.A., Perkins, W.T., Fuge, R., Pearce, N.J.G., and Wintle, A.G., 1994, Trace-element analysis of volcanic glass shards by laser ablation inductively coupled plasma mass spectrometry: application to tephrochronological studies: Applied Geochemistry, v. 9, n. 3, p. 323-335.