Sample: 91CND05
| Sample ID: | 91CND05 [1] |
| Station ID: | 91CND05 |
| 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: | Large flow of platy lava overlying sedimentary country-rock. Surface elevation drops before climbing up to Douglas summit, so presumably proximal part of flow has been eroded. Porphyritic two-pyroxene andesite. ~30% phenocrysts of plagioclase (up to 0.9 x 0.6 mm), pyroxene (up to 1.1 x 0.5 mm), and opaque Fe-Ti oxides in a matrix of devitrified glass and subordinate microphenocrysts and microlites. Pl:px ~ 1:1. Glomerocrysts of pyroxene and pyroxene plus plagioclase common. Sieve texture prominent in most plagioclase crystals. |
| Sample Location: |
