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Sample: ACT-727

Sample ID: ACT-727 [1] [2]
Station ID: ACT-727
AT Num:
Volcano:
Possible source: Aniakchak
Eruption: Aniakchak CFE II
Collector: Beget, J. E.
Date sampled:
Sample type 1: Tephra Fall
Color:
Final unit:
Text Description: Lens of ash 1-2 cm thick; occurs in a paleosol developed in a low sand dune capping a beach ridge. Discontinuous horizon that can be traced for several hundred meters. Abundant orthopyroxene, lesser amounts of clinopyroxene and amphibole (horneblend). Clear glass shards on average 50 microns in diameter, consisting largely of bubble wall junctions and platey glass shards, although blocky and pumiceous shards are also present.
Sample Location:

References Cited

[1] Late Pleistocene environments of the western Noatak basin, northwestern Alaska, 1999

Elias, S. E., Hamilton, T. D., Edwards, M. E., Beget, J. E., Krumhardt, A. P., and Lavoie, C., 1999, Late Pleistocene environments of the western Noatak basin, northwestern Alaska: Geological Society of America Bulletin, v. 111, p. 769-789.

[2] Age, extent, and climatic significance of the c. 3400 BP Aniakchak tephra, western Alaska, USA, 1992

Beget, James, Mason, Owen, and Anderson, Patricia, 1992, Age, extent, and climatic significance of the c. 3400 BP Aniakchak tephra, western Alaska, USA: The Holocene, v. 2, n. 1, p. 51-56.