Alaska Volcano Observatory
Seguam reported activity
EVENT SPECIFIC INFORMATION
Event Name : Seguam 7500 yBP
|Start: 7500 (± 2000 Years) || Years BP Ar/Ar || |
|Lava flow: ||
From Jicha and Singer (2006): "An older, tundra-covered 0.08 km cubed rhyolite flow (rcv) crops out to the west of the rcc cone. This plagioclase-phyric lava dips 20 degrees to the northwest and is strongly flow banded with alternating layers of red rubble and black, glassy rhyolite. Three incremental-heating experiments from the glassy rhyolite yielded a weighted mean plateau age of 7.5+/-2.0 ka (Table 1; Fig. 5 [in original text])."
Page modified: March 30, 2017 14:36
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