TYPES OF VOLCANOS IN TERMS OF VISCOSITY AND GAS CONTENT
Low viscosity, low gas:
shield volcano= effusive eruption. It has runny lava. It is slower than walking
low viscosity, high gas:
shield volcano= hawaiian fire fountain. lava sprays in the air and sloshes around the vent
medium-low viscosity, low gas
cinder cone= building eruption, minor, little force, dense blobs, splatters rim
medium-low viscosity
cinder cone=strombolian, series of booming eruptions, marble/boulder size rock fragments; shapes the volcano
medium-high viscosity, low gas
dome= minor eruption, lava hard to flow, piles up in a dome shape, pancake shaped lava, no real flow
medium-high viscosity, high gas
stratovolcano=vulcanian eruption, cannon-like bursts, some lava flow
high viscosity, low gas
dome= slow eruption, thick magma, like toothpaste, small material ejected w/ little force, ash clouds, pyroclastic flow if dome collapses
high viscosity, high gas
stratovolcano= Plinian eruption, most explosive. Blows top, ash clouds, pyroclastic flow, lahar, landslide, debris, plume, lava flow, tephra
No comments:
Post a Comment