Alaska Volcano Observatory

Fine grained basaltic andesite on southwest flank of Vsevidof. 400’ asl. Fine-grained basaltic andesite with sparse microphenocrysts of plagioclase and rare olivine in a groundmass composed of 60% large plagioclase laths (0.5 x 0.1 mm), interstitial mafic crystals, and microcrystalline to hypocrystalline material.

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] Geochemistry of some Quaternary lavas from the Aleutian Arc and Mt. Wrangell, 2018

Nye, C.J., Beget, J.E., Layer, P.W., Mangan, M.T., McConnell, V.S., McGimsey, R.G., Miller, T.P., Moore, R.B., and Stelling, P.L., 2018, Geochemistry of some quaternary lavas from the Aleutian Arc and Mt. Wrangell: Alaska Division of Geological & Geophysical Surveys Raw Data File 2018-1, 29 p. http://doi.org/10.14509/29843

publication on DGGS website.

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