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Sample: 73-ARh-94

Sample ID: 73-ARh-94 [1]
Station ID: 73-ARh-94
AT Num:
Volcano:
Possible source:
Eruption:
Collector: Richter, D. H.
Date sampled: 1973-00-00
Sample type 1: Lava
Color:
Final unit:
Text Description: Wrangell Lava. Crystal-poor rhyolite dome. Pale-red, yellowish-gray to light-gray rhyolite generally exhibiting very fine and extremely contorted flow laminations. Contains traces of sodic plagioclase, less than 1 mm in diameter, in a cryptocrystalline groundmass. Includes a number of small exposures of rhyolite to the south and east of the main mass. May have been fed from multiple vents.
Sample Location:

References Cited

[1] Geologic map of the Nabesna B-6 Quadrangle, south-central Alaska, 1993

Richter, D. H., Smith, J. G., Schmoll, H. R., and Smith, R. L., 1993, Geologic map of the Nabesna B-6 Quadrangle, south-central Alaska: U.S. Geological Survey Geological Quadrangle Map GQ 1688, unpaged, 1 sheet, scale 1:63,360.