Sample: 91CND17
| Sample ID: | 91CND17 [1] |
| Station ID: | 91CND17 |
| AT Num: | |
| Volcano: | Douglas |
| Possible source: | |
| Eruption: | |
| Collector: | Nye, C. J. |
| Date sampled: | 1991-01-01 |
| Sample type 1: | Lava |
| Color: | |
| Final unit: | |
| Text Description: | 60 cm diameter radially fractured block lying on surface at crater rim. Porphyritic andesite. ~40% phenocrysts of plagioclase (up to 1.0 x 0.5 mm), pyroxene (0.5 x 0.4 mm), and opaque Fe-Ti oxides in a matrix of devitrified glass and subordinate microphenocrysts and microlites. Pl:px ~ 3:2. About half of the plagioclase phenocrysts are extensively sieved, the rest are nearly free of disequilibrium textures. |
| Sample Location: |
