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SAMPLE INFO : 81ASJ77BN
Sample ID:81ASJ77BN
Station ID:81ASJ77B
Latitude:62.338
Longitude:-143.556
Datum:NAD83
Date Sampled:1981-01-01
Sample Type 1:Lava
Field Lithology:Andesite
Text Description:
fine-grained glassy olivine-free clinopyroxene andesite. Sample is from the center of an isolated pillow within a thick deposit of monolithologic hyaloclastite and interbedded broken pillow breccia layers and autointrusive flow tongues. Whole rock K-Ar date of 1.63 +/- 0.05 m.y. Sample is from pre-Tanada lava, in Tanada area.

References:
Shield volcanoes in the Wrangell Mountains, Alaska

SAMPLE LOCATION

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