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Koniuji Island description and information


Official Name: Koniuji Island
Most Recent Activity:-1150
Seismically Monitored: No
Elevation: 892 ft (272 m)
Latitude: 52.22144° N
Longitude:175.13182° W
CAVW Number:311140
Pronunciation: Sound file
Nearby towns:Atka 39 mi (64 km) SE
Adak 68 mi (109 km) SW
Nikolski 268 mi (431 km) NE
Unalaska 375 mi (603 km) NE
Anchorage 1130 mi (1818 km) NE
From Jicha (2009) [1]: Koniuji is a nascent stratovolcano, with 40Ar/39Ar ages that indicate subaerial lavas and domes erupted over the last 15,000 years, including at least three eruptions within the last 6000 years. It has an estimated volume of 1 cubic km, with approximately 25% of that volume subaerial. Dated products include older basaltic andesite lavas and younger andesite dome rocks.

Wood and Kienle (1990) [2] note that in 1981, "geologists from the USGS research vessel S.P. Lee landed in a small boat to collect samples. The collected rocks are from andesite flows, and pyroclastic deposits. A northeast-trending fault cuts the island on the southeast. A possible vent occurs just north of the highest point on the island."

Holocene volcanic activity at Koniuji Island, Aleutians, 2009
citation imageJicha, B.R., 2009, Holocene volcanic activity at Koniuji Island, Aleutians: Journal of Volcanology and Geothermal Research, v. 185, n. 3, p. 214-222.

Volcanoes of North America: United States and Canada, 1990
Wood, C. A., and Kienle, Juergen, (eds.), 1990, Volcanoes of North America: United States and Canada: New York, Cambridge University Press, 354 p.

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Page modified: September 29, 2020 12:19
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