Alaska Volcano Observatory

1-cm-thick, dark tephra that underlies the mud with tephra A unit by ~50 cm in each core. Characterized by fine-sand to coarse-silt grain size and position below tephra A. Characterized by platy, brown glass shards that are phenocrystic and microlitic. The glass has conicle and equant vesicles, and shards containing bubble-wall junctions are also present.

Sample Location:

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Legend

	Red (Warning)
	Orange (Watch)
	Yellow (Advisory)
	Green (Normal)
	Uninstrumented

300 km

200 mi

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References Cited

[1] A record of late Holocene glacier fluctuations, Ahklun Mountains, southwestern Alaska, 2002

Levy, L.B., 2002, A record of late Holocene glacier fluctuations, Ahklun Mountains, southwestern Alaska: Northern Arizona University M.S. thesis, 71 p.

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