Sample: 91CND38
Sample ID: | 91CND38 [1] |
Station ID: | 91CND38 |
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: | Sample from 1950 ft elevation from package of flows capping countryrock 7—12 km northwest of Douglas summit. Porphyritic andesite with about 35% phenocrysts of millimeter-sized plagioclase, sub-millimeter-sized ortho- and clinopyroxene, and opaque oxides in a groundmass of brown glass, microlites, and microphenocrysts. |
Sample Location: |