Sample: 79AM55
| Sample ID: | 79AM55 [1] |
| Station ID: | 79AM55 |
| AT Num: | |
| Volcano: | Ugashik caldera |
| Possible source: | |
| Eruption: | |
| Collector: | Miller, T. P. |
| Date sampled: | 1979-01-01 |
| Sample type 1: | Lava |
| Color: | |
| Final unit: | |
| Text Description: | Porphyritic hornblende dacite. Phenocrysts of plagioclase (21%), quartz (6%), hornblende (3%), and trace amounts of biotite and orthopyroxene in a slightly vesiculated (6%) felsic groundmass (60%) with minor glass. |
| Sample Location: |
References Cited
[1] Geology of the Ugashik-Mount Peulik volcanic center, Alaska, 2004
Miller, T. P., 2004, Geology of the Ugashik-Mount Peulik volcanic center, Alaska: U.S. Geological Survey Open-File Report 2004-1009, 19 p., 2 sheets, scale 1:63,360.
full-text PDF 1.7 MB
plate 1 PDF 660 KB
plate 2 PDF 142 KB