Sample: 81ARj 18


Sample ID: 81ARj 18 [1]
Station ID: 81ARj 18
AT Num:
Volcano: Kialagvik
Possible source:
Eruption:
Collector: Riehle, J. R.
Date sampled: 1981-01-01
Sample type 1: Lava
Color:
Final unit:
Text Description: Two pyroxene-plagioclase dacite (S; high-silica andesite G) porphyry. Phenocrysts of orthopyroxene and clinopyroxene in a fine-grained groundmass. Orthopyroxene dominates. Many phenocrysts are in reaction relation with groundmass, and groundmass appears recrystallized.
Sample Location:

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.