Sample: 81ASJ77BF

Sample ID:	81ASJ77BF ^[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 1.99 +/- 0.08 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.

Alaska Volcano Observatory

Sample: 81ASJ77BF

References Cited

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