rhyolitic silica - rich lava is the type of lava that is associated with cinder cones.
rhyolitic silica - rich lava is the type of lava that is associated with cinder cones.
what type of lava is associated with cinder cones?
rhyolitic silica - rich lava
Na
Na
a typical eruption along the great rift and similar basaltic rift systems starts with a curtain of very fluid lava shooting up to high along a segment of the rift up to long. as the eruption continues, pressure and heat decrease and the chemistry of the lava becomes slightly more silica rich. the curtain of lava responds by breaking apart into separate vents. various types of volcanoes may form at these vents: gas-rich pulverized lava creates cinder cones (such as inferno cone – stop 4), and pasty lava blobs form spatter cones (such as spatter cones – stop 5). later stages of an eruption push lava streams out through the side or base of cinder cones, which usually ends the life of the cinder cone (north crater, watchmen, and sheep trail butte are notable exceptions). this will sometimes breach part of the cone and carry it away as large and craggy blocks of cinder (as seen at north crater flow – stop 2 – and devils orchard – stop 3). solid crust forms over lava streams, and lava tubes (a type of cave) are created when lava vacates its course (examples can be seen at the cave area – stop 7).
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