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Sample info : 10
Sample ID:10
Station ID:10
Latitude:57.18
Longitude:-170.3
Datum:NAD83
Date Sampled:1948-01-01
Sample Type 1:Lava
Sample Type 2:Flow
Text Description:
Sample of a dense flow of phyric hyalobasanite. Olivine, augite, and plagioclase occur as phenocrysts. Augite is commonly twinned, ??c=43 degrees, (+) 2V=50-55 degrees, r>v distinct. The plagioclase crystals are also twinned, extinction angles correspond to An60. In the groundmass the plagioclase ranges from An60-An35.

References:
Geology and petrology of the Pribilof Islands, Alaska


Sample Location

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Page modified: August 7, 2013 07:43
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