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Volcanoes (Composite Volcanoes (Features (Built from alternating layers of…
Volcanoes
Composite Volcanoes
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Features
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Lava produced is cooler with a high viscosity
⇨ Therefore it moves slowly, cooling + hardening quickly before it can spread over a large area.
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Formation of Features
Periodic outpourings of slow-moving lava rest in a gradual accumulation of material on the volcanos slopes
⇨ Results in a cone-like, layered structure
Craters at suits, central or clustered group of vents
⇨ Lava may cool within these vents
⇨ Sometimes creates a volcanic plug
⇨ Causes an extreme build-up of pressure if magma is trapped underneath
⇨ This leads to violent, explosive eruptions
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Shield Volcanoes
Features
Formed by the successive accumulation of fluid lava flows, which descend from summit or flank fissure systems
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