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Yunaska reported activity

YUNASKA LINKS

SAMPLES
EVENT SPECIFIC INFORMATION

Event Name : Yunaska CFE I

Stop: 11700 Years BP Unknown dating method

Caldera/crater: BibCard
Eruption Type:Explosive
Other""

Description: From Miller and others (1998): "The eastern volcanic center, to which all recent Yunaska volcanism has been attributed, has been described by Nicolaysen and others (1992) and Lamb and others (1992) in preliminary reports as a large shield volcano topped by two overlapping calderas. No age has been reported for caldera formation but the fresh morphology of the younger caldera and the non-glaciated nature of the associated pyroclastic rocks suggests it at least is Holocene in age. The older of the two calderas (caldera CI, Lamb and others, 1992) has a diameter of 10-13 km, the younger (caldera CII) about 3 km. Low ridges and peaks along the northern and eastern shores of the island define the postulated caldera (see physiographic descriptions in Sekora, 1973)."

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Page modified: March 30, 2017 14:36
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