Sample: 73-ARh-23

Sample ID:	73-ARh-23 ^[1] ^[2]
Station ID:	73-ARh-23
AT Num:
Volcano:	Drum
Possible source:
Eruption:
Collector:	Richter, D. H.
Date sampled:	1973-00-00
Sample type 1:	Lava
Color:
Final unit:
Text Description:	Rhyodacite dome of Snider Peak - remnant core of rhyodacite dome representing one of the latest stages of eruptive history of Mount Drum Volcano. Rocks of dome are light gray to light buff gray, have a sugary texture, and are locally vesicular. They contain sparse small (2 mm) phenocrysts of plagioclase, strongly oxidized hornblende, and rare hypersthene and augite in a vapor-phase crystallized groundmass of feldspars and minor hypersthene. Chemistry: sample 17 (73-ARh-23)
Sample Location:

References Cited

[1] Eruptive history and petrology of Mount Drum volcano, Wrangell Mountains, Alaska, 1994

Richter, D.H., Moll-Stalcup, E.J., Miller, T.P., Lanphere, M.A., Dalrymple, G.B., and Smith, R.L., 1994, Eruptive history and petrology of Mount Drum volcano, Wrangell Mountains, Alaska: Bulletin of Volcanology, v. 56, n. 1, p. 29-46.

[2] Geologic map of the Gulkana A-2 quadrangle, Alaska, 1979

Richter, D. H., Smith, R. L., Yehle, L. A., and Miller, T. P., 1979, Geologic map of the Gulkana A-2 quadrangle, Alaska: U.S. Geological Survey Geological Quadrangle Map GQ 1520, unpaged, 1 plate, scale 1:63,360.

Link to free map online

Alaska Volcano Observatory

Sample: 73-ARh-23

References Cited

[1] Eruptive history and petrology of Mount Drum volcano, Wrangell Mountains, Alaska, 1994

[2] Geologic map of the Gulkana A-2 quadrangle, Alaska, 1979