Sample: 91CND11
| Sample ID: | 91CND11 [1] | ||||||||||
| Station ID: | 91CND11 | ||||||||||
| 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 avalanche deposit; clast-supported; blocks to 1-2m diameter. Matrix-supported block and ash flow deposits (which entrained minor amounts of rounded stream cobbles) also exist nearby. Porphyritic two-pyroxene andesite. ~30% phenocrysts of plagioclase (up to 1.2 x 0.6 mm, but typically smaller), pyroxene (up to 1.0 x 0.5 mm, but typically smaller), and opaque Fe-Ti oxides in a matrix of devitrified glass and subordinate microphenocrysts and microlites. Pl:px ~ 1:1 | ||||||||||
| Sample Location: |
  Legend ✕
300 km 200 mi |
