Sample: 47AC90A
| Sample ID: | 47AC90A [1] [2] |
| Station ID: | 47AC90A |
| AT Num: | |
| Volcano: | Semisopochnoi |
| Possible source: | Semisopochnoi |
| Eruption: | |
| Collector: | Unknown, Unknown |
| Date sampled: | 1947-01-01 |
| Sample type 1: | Tephra Fall |
| Color: | |
| Final unit: | CFE - nature unknown |
| Text Description: | A fragment of pumice from the relatively thin layer that accumulated at 128,300'E., 273,500'N., in a protected sector of the old cone. This is largely a pumiceous clear glass of index 1.515, containing small shreds of dark-green glass of index 1.554. The clear glass has crystals of labradorite (An57), hypersthene, augite, green hornblende, and apatite. |
| 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.
full-text PDF 1.4 MB
plate 59 PDF 2.7 MB