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: |
References Cited
[1] Geology of Buldir Island, Aleutian Islands, Alaska, 1953
Coats, R. R., 1953, Geology of Buldir Island, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 0989-A, 26 p.
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