Kupreanof 570000 yBP
Start: 570000 yBP [1]
Event Type: Effusive
- Lava flow [1]
Description: From Wilson and others (1989): "Two mafic andesite flows from Kupreanof volcano yield ages of 0.57 Ma (locality 15, table 3 [in original text]) and approximately 2.1 Ma (Nora Shew and F.H. Wilson, unpub. data, 1988). Although these two flows are virtually identical chemically, the younger of the two flows is orthopyroxene, clinopyroxene, and olivine bearing whereas the older contains only clinopyroxene as a mafic phase."
References Cited
[1] Geologic setting, petrology, and age of Pliocene to Holocene volcanoes of the Stepovak Bay area, western Alaska Peninsula, 1989
Wilson, F. H., 1989, Geologic setting, petrology, and age of Pliocene to Holocene volcanoes of the Stepovak Bay area, western Alaska Peninsula: in Dover, J. H. and Galloway, J. P., (eds.), Geological studies in Alaska by the U.S. Geological Survey, 1988, U.S. Geological Survey Bulletin 1903, p. 84-95.
full-text PDF 403 KB Complete Eruption References
Geologic setting, petrology, and age of Pliocene to Holocene volcanoes of the Stepovak Bay area, western Alaska Peninsula, 1989
Wilson, F. H., 1989, Geologic setting, petrology, and age of Pliocene to Holocene volcanoes of the Stepovak Bay area, western Alaska Peninsula: in Dover, J. H. and Galloway, J. P., (eds.), Geological studies in Alaska by the U.S. Geological Survey, 1988, U.S. Geological Survey Bulletin 1903, p. 84-95.
full-text PDF 403 KB 