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Sample: AMK-7

Sample ID: AMK-7 [1]
Station ID: AMK-7
AT Num:
Volcano: Amak
Possible source:
Eruption:
Collector: Unknown, Unknown
Date sampled:
Sample type 1: Lava
Color:
Final unit:
Text Description: Porphyritic lava with phenocrysts of plagioclase, oxyhornblende, and orthopyroxene set in a felty groundmass of glass and minerals. Sampled from a unit that is tan, porous, noncompact, and highly oxidized, and it contains oxyhornblende instead of clinopyroxene and magnetite.
Sample Location:
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Legend
✕
Red (Warning)
Orange (Watch)
Yellow (Advisory)
Green (Normal)
Uninstrumented

100 km
100 mi
Leaflet U.S. Department of the Interior | U.S. Geological Survey | Policies

References Cited

[1] Geology of Amak Island, Aleutian Islands, Alaska, 1979

Marsh, B. D., and Leitz, R. E., 1979, Geology of Amak Island, Aleutian Islands, Alaska: Journal of Geology, v. 87, n. 6, p. 715-723.