Sample: AK-81-50

Sample ID:	AK-81-50 ^[1]
Station ID:	AK-81-50
AT Num:
Volcano:	Akutan
Possible source:
Eruption:
Collector:	Unknown, Unknown
Date sampled:	1981-01-01
Sample type 1:	Lava
Color:
Final unit:
Text Description:	Slightly altered porphyritic andesite dike. Plagioclase and clinopyroxene phenocrysts in a holocrystalline groundmass. The clinopyroxene exhibits two periods of growth: an early stage as independent phenocrysts and a late stage where it ophitically encloses groundmass plagioclase laths. The two stages are optically continuous.
Sample Location:

References Cited

[1] The igneous petrology and geochemistry of northern Akutan Island, Alaska, 1982

Romick, J. D., 1982, The igneous petrology and geochemistry of northern Akutan Island, Alaska: University of Alaska Fairbanks unpublished M.S. thesis, 151 p.