Alaska Volcano Observatory

Coarse fraction of vitrophyre, pumice, and accretionary lapilli. Tephra sample assigned to Spurr volcano, approximately similar in composition to pumice lapillus in the Spurr pyroclastic-flow deposits.

Sample Location:

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

300 km

200 mi

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References Cited

[1] A reconnaissance of the major Holocene tephra deposits in the upper Cook Inlet region, Alaska, 1985

Riehle, J. R., 1985, A reconnaissance of the major Holocene tephra deposits in the upper Cook Inlet region, Alaska: Journal of Volcanology and Geothermal Research, v. 26, n. 1-2, p. 37-74.

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