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Sample: 74-AMm-87

Sample ID: 74-AMm-87 [1] [2]
Station ID: 74-AMm-87
AT Num:
Volcano: Drum
Possible source:
Eruption:
Collector: Miller, T. P.
Date sampled: 1974-00-00
Sample type 1: Tephra Fall
Color:
Final unit:
Text Description: Ash Flow and Pumice Deposits from Mount Wrangell or Mount Drum. Semi-indurated rocks are light gray and consist of unsorted blocks, pumice, and ash of hornblende dacite generally overlying finer grained and stratified airfall beds of same composition. Upper 20 m of deposit (sec. 8, 16, 17, T. 3 N., R. 5 E.) is moderately welded, forming bold light-gray cliffs with weakly developed columnar joints.
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.