ConeThis awesome feature is Vent Mountain, found within the much larger Aniakchak Caldera on the Ala

ConeThis awesome feature is Vent Mountain, found within the much larger Aniakchak Caldera on the Alaskan Peninsula. This is a typical volcano that might grow inside a caldera on top of a subduction zone – the caldera is filled in by lava flows and explosive eruptions during the millennia after the main caldera-forming eruption.Vent Mountain formed during an eruption of this caldera in 1931, the only historic eruption of this site. In this aerial photo taken by a USGS scientist in 2014 you can see the crater at the top of the cone and small bits of what is likely a low lava dome at the bottom (the slightly crinkled up rocks at the bottom of the crater). The erosive scours on the sides make for a really interesting texture too.-JBBImage credit: https://flic.kr/p/s6ZtfaRead more: http://tmblr.co/Zyv2Js1PHULax -- source link

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