Home
Volcanoes
Webcams
News
Explore Data
Images
Get Involved
About AVO

Sample: 81ARj 16

Sample ID: 81ARj 16 [1]
Station ID: 81ARj 16
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: Porphyritic plagioclase-orthopyroxene-clinopyroxene dacite (S; high-silica andesite G) flow. Weakly foliated phenocrysts of plagioclase (An 58) in a glassy groundmass. Grain boundaries and fractures in some clinopyroxene are altered to opaque minerals. Larger phenocrysts are fractured and shattered. Rare lithic (?) fragments. Rounded quartz phenocrysts in reaction relation with groundmass.
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.