Sample: 88VS02
| Sample ID: | 88VS02 [1] | ||||||||||
| Station ID: | 88VS02 | ||||||||||
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| Volcano: | Vsevidof | ||||||||||
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| Collector: | Nye, C. J. | ||||||||||
| Date sampled: | 1988-01-01 | ||||||||||
| Sample type 1: | Lava | ||||||||||
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| Text Description: | Sample from isolated 130 m high hill southeast of Cape Kigushimkada. Outcrop consists of highly jointed andesite with 4-6cm columns with steep landward dip. Note: this hill incorrectly shown as Tdp on map of Byers (1959). Glomeroporphyritic andesite. 20 vol. % plagioclase glomerocrysts up to 3 mm diameter (individual crystals 1 x 0.4 mm); 2 % pyroxene phenocrysts (0.8 x 0.5 mm); <1% opaque oxides (0.4 mm); 75% trachytic hypocrystalline groundmass (plagioclase microlites 200 x 30 microns; intersertal pyroxene; dark reddish brown glass). Plagioclase phenocrysts contain scattered rounded inclusions up to 50 microns in diameter, but are free of dusty, reacted zones. | ||||||||||
| Sample Location: |
  Legend ✕
300 km 100 mi |
