Alaska Volcano Observatory

Rounded vesicular magmatic inclusion in 91CND16. Contains large phenocrysts of chromite-bearing olivine (but not plagioclase) in a vesicular groundmass of interlocking plagioclase, pyroxene, and olivine. Olivine basaltic andesite magmatic inclusion. Rounded magmatic inclusion in 91CND16 host with 40% vesicles, 20% olivine (up to 1.3 x 0.6 mm, and containing euhedral translucent brown chromite octahedral) in a holocrystalline matrix compose of subequal amounts of plagioclase (300 x 80 microns) and pyroxene (200 x 150 microns).

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] 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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