Volcanic Eruptions (Leaving Cert CASD): Flashcards

Molten rock beneath Earth's surface

Magma that reaches the surface

It's less dense than solid rock, so it rises naturally

Thin, runny magma; gentle lava flows (e.g. Hawaii)

Thick, sticky magma; violent explosion (e.g. Mt St Helens)

Magma fragments blasted into air in explosive eruptions

Mudflows from hot volcanic material mixing with water

Up to 0.5°C global temperature reduction

'Year without a summer', 3°C cooling in N hemisphere

Break down to create fertile, nutrient-rich agricultural soils