Sample: P49Se14
| Sample ID: | P49Se14 [1] [2] |
| Station ID: | P49Se14 |
| AT Num: | |
| Volcano: | Anvil Peak |
| Possible source: | |
| Eruption: | |
| Collector: | Powers, H. A. |
| Date sampled: | 1947-05-01 |
| Sample type 1: | Lava |
| Color: | |
| Final unit: | Anvil Peak |
| Text Description: | From a flow, apparently derived from Anvil Peak, that predates the eruption of the dacitic tuff, according to Powers. This is a medium-brownish-gray (5YR 5/1) porphyritic, slightly vesicular basaltic andesite. The phenocrysts (3 mm in size) include bytownite (An82), olivine (Fa15), and sparse augite that is green in hand specimen. The groundmass is an hyalopilitic web of plagioclase microlites, augite, and magnetite. |
| Sample Location: |
References Cited
[1] Geologic reconnaissance of Semisopochnoi Island, western Aleutian Islands, Alaska, 1959
Coats, R. R., 1959, Geologic reconnaissance of Semisopochnoi Island, western Aleutian Islands, Alaska: in Investigations of Alaskan volcanoes, U.S. Geological Survey Bulletin 1028-O, p. 477-519, 1 sheet, scale 1:25,000.
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