Koniuji 3100 yBP
Start: 3100 yBP ± 1900 Years [1]
Event Type: Effusive
- Lava flow [1]
- Lava dome [1]
Description: From Jicha (2009): "Lavas and domes from a 3.1 ka and younger andesitic complex represent the latest major phase of activity on the island are the most evolved."
"An angular block from within the hornblende bearing andesitic dome complex yielded a 40Ar/39Ar age of 3.1+/-1.9 ka. A single experiment on sample KON-07-05, a hornblende andesite collected at 177 m above sea level from near the center of the island, failed to yield a significant amount of radiogenic 40Ar. This sample likely represents the youngest part of the hornblende andesite unit and erupted within thelast three millennia."
"An angular block from within the hornblende bearing andesitic dome complex yielded a 40Ar/39Ar age of 3.1+/-1.9 ka. A single experiment on sample KON-07-05, a hornblende andesite collected at 177 m above sea level from near the center of the island, failed to yield a significant amount of radiogenic 40Ar. This sample likely represents the youngest part of the hornblende andesite unit and erupted within thelast three millennia."
References Cited
[1] Holocene volcanic activity at Koniuji Island, Aleutians, 2009
Jicha, B.R., 2009, Holocene volcanic activity at Koniuji Island, Aleutians: Journal of Volcanology and Geothermal Research, v. 185, n. 3, p. 214-222.Complete Eruption References
Holocene volcanic activity at Koniuji Island, Aleutians, 2009
Jicha, B.R., 2009, Holocene volcanic activity at Koniuji Island, Aleutians: Journal of Volcanology and Geothermal Research, v. 185, n. 3, p. 214-222.
