Alaska Volcano Observatory

Rounded basaltic andesite magmatic inclusion in 91CND35. Highly crystalline fine-grained basaltic andesite magmatic inclusion. There are sparse microphenocrysts of plagioclase and pyroxene, but sample texture is dominated by an interconnected network of 50 x 500 micron plagioclase microlites, 100 micron diameter clino- and orthopyroxene crystals, and smaller Fe-Ti oxides. About 20% of the sample is intergranular space, the majority of which is void, and the rest of which contains clear glass.

Sample Location:

Great Sitkin

Spurr

+−

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Legend

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

100 km

100 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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