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Sample: 81ASJ77BN

Sample ID: 81ASJ77BN [1]
Station ID: 81ASJ77B
AT Num:
Volcano: Tanada Peak
Possible source:
Eruption:
Collector: Unknown, Unknown
Date sampled: 1981-01-01
Sample type 1: Lava
Color:
Final unit:
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.
Sample Location:

References Cited

[1] Shield volcanoes in the Wrangell Mountains, Alaska, 1984

Richter, D. H., Smith, J. G., Ratte, J. C., and Leeman, W. P., 1984, Shield volcanoes in the Wrangell Mountains, Alaska: in Reed, K. M. and Bartsch-Winkler, Susan, (eds.), The United States Geological Survey in Alaska: accomplishments during 1982, U.S. Geological Survey Circular C 0939, p. 71-75.