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Sample: 78ADt 34

Sample ID: 78ADt 34 [1]
Station ID: 78ADt 34
AT Num:
Volcano: Yantarni
Possible source:
Eruption:
Collector: Detterman, R. L.
Date sampled: 1978-01-01
Sample type 1: Lava
Color: light green gray
Final unit:
Text Description: Lightly iron-stained, light-green-gray, porphyritic andesite containing phenocrysts of plagioclase and clinopyroxene in a groundmass of glass and fine-grained plagioclase. Plagioclase (An 55-60) phenocrysts are sieve textured and contain inclusions of glass. The groundmass shows poorly developed flow foliation around phenocrysts. Pilotaxitic texture.
Sample Location:
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Red (Warning)
Orange (Watch)
Yellow (Advisory)
Green (Normal)
Uninstrumented

100 km
50 mi
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References Cited

[1] Map and tables showing geochronology and whole-rock geochemistry of selected samples, Ugashik and part of Karluk quadrangles, Alaska, 1992

Wilson, F.H., and Shew, Nora, 1992, Map and tables showing geochronology and whole-rock geochemistry of selected samples, Ugashik and part of Karluk quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1539-E, 34 p., 2 sheets, scale 1:250,000.