Sample: Barth_1956_17
| Sample ID: | Barth_1956_17 [1] |
| Station ID: | Barth_1956_17 |
| AT Num: | |
| Volcano: | St. Paul Island |
| Possible source: | |
| Eruption: | |
| Collector: | Barth, T. F. W. |
| Date sampled: | 1948-01-01 |
| Sample type 1: | Lava |
| Color: | black and gray |
| Final unit: | |
| Text Description: | Hyalobasanite injected under observation house at Einahnuhto Bluffs, St. Paul Island. The rock has fluidal structure, is black and gray with small phenocrysts of plagioclase, about 0.5 x 0.01 mm, and peculiar “hollow” phenocrysts of olivine, from 0.1 to 0.5 mm across. The groundmass is glassy with opaque pigments of magnetite and (or) ilmenite, and small grains of augite 0.01 to 0.02 mm in diameter and laths of plagioclase, about 0.5 mm long and 0.01 mm thick. |
| Sample Location: |
References Cited
[1] Geology and petrology of the Pribilof Islands, Alaska, 1956
Barth, T. F. W., 1956, Geology and petrology of the Pribilof Islands, Alaska: in Investigations of Alaskan volcanoes, U.S. Geological Survey Bulletin 1028-F, p. 101-160, 2 sheets, scale unknown.
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