Sample: Barth_1956_10
| Sample ID: | Barth_1956_10 [1] |
| Station ID: | Barth_1956_10 |
| AT Num: | |
| Volcano: | St. Paul Island |
| Possible source: | |
| Eruption: | |
| Collector: | Barth, T. F. W. |
| Date sampled: | 1948-01-01 |
| Sample type 1: | Lava |
| Color: | |
| Final unit: | |
| Text Description: | Sample of a dense flow of phyric hyalobasanite. Olivine, augite, and plagioclase occur as phenocrysts. Augite is commonly twinned, ??c=43 degrees, (+) 2V=50-55 degrees, r>v distinct. The plagioclase crystals are also twinned, extinction angles correspond to An60. In the groundmass the plagioclase ranges from An60-An35. |
| 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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