Volcano Classification Flashcards
1
Q
Fissure eruptions
A
Elongated crack allows lava to spill out.
Constructive Pb as tension causes crust to crack.
Or rift valleys.
Basaltic / gentle / frequent
2
Q
Shield volcanoes
A
Basaltic
Gently sloping cones with layers of less viscous lava.
Hot spots / oceanic / oceanic crust
Hawaii
Gentle
3
Q
Composite volcanoes
A
Common on land.
Explosive eruptions create layers of andestic rock.
Destructive margins
Explosive
Mt etna
4
Q
Acid dome volcanoes
A
Steep sided convex come shape.
Very viscous can’t travel far.
Rhyolitic.
Explosive
5
Q
Caldera
A
Gases build up beneath blocked volcanic vent and causes big eruption destroying volcano summit - leaves enormous crater
Crater lake , USA.
Andesitic - destructive Pb - explosive
