Alaska Volcano Observatory
Aniakchak reported activity
EVENT SPECIFIC INFORMATION
Event Name : Aniakchak Vent Mountain Lava Flows
|Start: 2300 (± 80 Years) || Years BP Tephrochronology || |
|Stop: 840 (± 30 Years) || Years BP Tephrochronology || |
|Lava flow: ||
|Eruption Product: || other ||
From Bacon and others (2014): "We describe the eruptive history of Vent Mountain beginning with lava flows inferred to be some of the earliest. Thickly tephra-mantled lava that flowed between Bolshoi Dome and Surprise Cone and now fronts onto Surprise Lake apparently came from Vent Mountain, as did lava that flowed between Surprise and Windy Cones. Early lava flows that originated at the west-northwest-east-southeast-trending fissure that cuts the south flank of Vent Mountain and from the summit crater are exposed in the walls of the fissure, as scattered outcrops on the south flank, overlying the east edge of New Cone, and in the walls of the two maar craters. The most far travelled of these flows terminates ~1 km southwest of The Gates (fig. 10A [in original text]).
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