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Sample: 73ARh17

Sample ID: 73ARh17 [1]
Station ID: 73ARh17
AT Num:
Volcano: Drum
Possible source:
Eruption:
Collector: Richter, D. H.
Date sampled: 1973-00-00
Sample type 1: Other
Color:
Final unit:
Text Description: Undifferentiated plugs and small intrusive bodies - Chiefly dacite in composition and probably related to second-cycle activity, but many outcrops high on Mount Drum were not visited. Dacitic rocks are light to medium gray with plagioclase, hornblende, and minor biotite and hypersthene phenocrysts in a felty to trachytic groundmass. One intrusive rhyodacite (sec. 29, T4N, R4E) is light buff gray and contains plagioclase and rare hornblende phenocrysts in a feldspar-rich pilotaxitic groundmass.
Sample Location:

References Cited

[1] Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex, 1997

Preece, S. J., 1997, Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex: Miami University (Ohio) unpublished Ph.D. dissertation, 547 p.