Composite Volcanoes and Supervolcanoes- ODE Exam 2

composite volcanoes

strato volcanoes

medium size and height

steeper slopes (~35)

mix of layers for a composite volcano

lava flows, pyroclastic flows, debris

what is composite volcanoes chemistry

intermediate

example of composite volcano

mt. st. helens

cascades

ring of fire that rims the pacific ocean

mt. st. helen

last significant eruption in the lower 48 states

1980

north side eruption

dome was created

washington state

pyroclastic ash flow

frictionless- driven by expanding gas and heated air

mt st helen eruption timeline

old magma chamber

vertical blast, budge starts growing, inflated magma chamber

vertical blast, sideways blast, landslide

lahar

volcanic mudflows- very dangerous

volcanic ash

angular glass shards

mt vesuvius

italy AD 79

buried pompeii

smallest volcano

witnessed by pliny the younger

tambora

indonesia 1815

year without a summer

1816

-3 temp

frankenstein influenced by the tambora volcano inspired mary shelly

mt pelee

martinique, caribbean

nuee ardente

pyroclastic flow

caldera formation

collapsed summit of volcanoes

opening where lava comes out- widens opening

yellowstone hotspot

fissures/vents to volcanoes

massive plume at depth caused the eruptions

caused columbia river basalt

fissure eruptions

cone shaped volcanoes

basalt lava flows

eruption out of fissure

lava fountaining

iceland

flood basalt

low veloscity

hotspot related

fissure eruption- mafic chem

thin lava flow

deccan basalt flow

hotspot in india

iceland

active fissure (hotspots and MOR)

lake toba

major subduction zone

volcanic lake

caused 1000 year ice age

most dangerous volcano in the lower 48 states

mt rainier