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Sample info : K-2560
Sample ID:K-2560
Station ID:K-2560
Sample Type 1:Lava
Text Description:
early Quaternary/late Tertiary pre-Snowy Mountain volcanic rocks - part of an older volcanic arc. Sample in thin section is 10-15% plagioclase, to 3 mm; 5% subequal amounts of clinopyroxene and orthopyroxene, to 1 mm; 1% oxides to 0.5 mm; no olivine; sieved plagioclase present in a few grains; no oxide-pyroxene-plagioclase aggregates.

Snowy Mountain: A pair of small andesite-dacite stratovolcanoes in Katmai National Park

Sample Location

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Page modified: August 7, 2013 07:43
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