Sample: 47AC26

Sample ID:	47AC26 ^[1]
Station ID:	47AC26
AT Num:
Volcano:	Buldir
Possible source:
Eruption:
Collector:	Unknown, Unknown
Date sampled:	1947-01-01
Sample type 1:	Lava
Color:	pale gray
Final unit:
Text Description:	Sample of lava flow forming the small hill (Hill 1350) south of Kittiwake Pond, is a pale gray, porous holocrystalline olivine andesite, about 77% plagioclase, which ranges in composition from An20 to An70 and averages about An45. Clinopyroxene grains, 0.1 to 0.5 mm (Di60,He40), make up 15% of the rock; olivine grains (Fa20), ranging in size from 0.2 to 2 mm, about 5%; and magnetite grains, 0.1 to 0.5 mm in size, about 3%. A trace of hypersthene is present. The seriate texture is essentially determined by the presence of stout subparallel laths of plagioclase with interstitial granules of clinopyroxene and magnetite.
Sample Location:

Coats, R. R., 1953, Geology of Buldir Island, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 0989-A, 26 p.

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Alaska Volcano Observatory