Sample: 91CNI09
| Sample ID: | 91CNI09 [1] |
| Station ID: | 91CNI09 |
| AT Num: | |
| Volcano: | Iliamna |
| Possible source: | |
| Eruption: | |
| Collector: | Nye, C. J. |
| Date sampled: | 1991-01-01 |
| Sample type 1: | Lava |
| Color: | |
| Final unit: | |
| Text Description: | Porphyritic basaltic andesite with phenocrysts of plagioclase (35%, up to 1 mm long), clinopyroxene (10%, 0.5 mm), subordinate orthopyroxene, and sparse olivine. Most plagioclase crystals are extensively sieved. Some orthopyroxene crystals are rimmed with clinopyroxene. Groundmass consists of abundant microlites (typically < 20 microns) with subordinate clear glass. One of several diverse lithologies collected from single location consisting of avalanche debris sitting on top of Red Glacier at ~2400 foot elevation. This location is at a fork in the glacier, and these samples could have come from either the main cone or North Twin. This location covered by subsequent rock/snow/ice avalanches (seen in landsat image on GE). "i" denotes fist-sized rounded blobs of macroscopically different magma enclosed in homogeneous host. |
| Sample Location: |
