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Alaska Volcano Observatory
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Sample info : 73AM30
Sample ID:73AM30
Station ID:73AM30
Latitude:57.766279164953
Longitude:-156.39909464269
Datum:NAD83
Date Sampled:1973-01-01
Sample Type 1:Lava
Field Lithology:Andesite
Text Description:
Porphyritic andesite. Phenocrysts of plagioclase (23%) and orthopyroxene (11%) with trace biotite olivine and metallic oxides in a groundmass (40%) of pale brown glass.

References:
Geology of the Ugashik-Mount Peulik volcanic center, Alaska


Sample Location

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Page modified: August 7, 2013 07:43
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