Sample: 96-ARh-53D
| Sample ID: | 96-ARh-53D [1] [2] |
| Station ID: | 96-ARh-53D |
| AT Num: | |
| Volcano: | Akutan |
| Possible source: | |
| Eruption: | |
| Collector: | Richter, D. H. |
| Date sampled: | 1996-00-00 |
| Sample type 1: | Lava |
| Color: | gray |
| Final unit: | lcb |
| Text Description: | Qcl - Cascade Bight lava flows. Thin (2-5 m) lava flows, exhibiting reddish scoriaceous tops and bottoms, dip away from summit breccia and plug area. Rocks are medium dark gray porphyritic basaltic andesites (55.1% SiO2) containing phenocrysts of plagioclase (10-15%, 3 mm), clinopyroxene (1-5%, 3 mm), orthopyroxene (1-3%, 1 mm), and olivine (1-3%, 3 mm) in a cryptocrystalline groundmass. Whole rock 40Ar/39Ar mean age of basaltic andesite is 0.15+/-0.05 Ma. |
| Sample Location: |
