Sample: ACT2007

Sample ID:	ACT2007 ^[1]
Station ID:	Nk-26
AT Num:
Volcano:
Possible source:
Eruption:	Old Crow Tephra
Collector:	Unknown, Unknown
Date sampled:
Sample type 1:	Tephra Fall
Color:
Final unit:
Text Description:	Noatak basin sample 95AHa 022. Lens of pinkish tephra as much as 4 cm thick near the base of the silt near the north end of the bluff. Clear, platy glass shards with secondary but significant percentage of bubble-junction shards, both as much as 80-100 mm in diameter. Very few juvenile ferromagnesium phenocrysts are present in the tephra, but small, euhedral crystals of clinopyroxene and orthopyroxene and rare amphibole and biotite were identified in grain mounts.
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.

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