Makushin Point Kovrishka flows
Start: 340000 yBP ± 40000 Years [1]
Stop: 300000 yBP ± 20000 Years [1]
Event Type: Effusive
Description: From Nye and others (1986): "The youngest dated Pleistocene flows are from the Point Kovrishka area and are 0.30+/-0.02 to 0.34+/-0.04 m.y."
References Cited
[1] Petrology and geochemistry of Quaternary volcanic rocks from Makushin volcano, central Aleutian Arc, 1986
Nye, C. J., Swanson, S. E., and Reeder, J. W., 1986, Petrology and geochemistry of Quaternary volcanic rocks from Makushin volcano, central Aleutian Arc: Alaska Division of Geological & Geophysical Surveys Public-Data File PDF 86-80, 123 p., 1 sheet, scale 1:50 000.[2] Geologic map of the Makushin volcanic field, Unalaska Island, Alaska, 1998
McConnell, V. S., Beget, J. E., Roach, A. L., Bean, K. W., and Nye, C. J., 1998, Geologic map of the Makushin volcanic field, Unalaska Island, Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 97-20, unpaged, 2 sheets, scale 1:63,360.
Complete Eruption References
Petrology and geochemistry of Quaternary volcanic rocks from Makushin volcano, central Aleutian Arc, 1986
Nye, C. J., Swanson, S. E., and Reeder, J. W., 1986, Petrology and geochemistry of Quaternary volcanic rocks from Makushin volcano, central Aleutian Arc: Alaska Division of Geological & Geophysical Surveys Public-Data File PDF 86-80, 123 p., 1 sheet, scale 1:50 000.
Geologic map of the Makushin volcanic field, Unalaska Island, Alaska, 1998
McConnell, V. S., Beget, J. E., Roach, A. L., Bean, K. W., and Nye, C. J., 1998, Geologic map of the Makushin volcanic field, Unalaska Island, Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 97-20, unpaged, 2 sheets, scale 1:63,360.