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GCSE Geography · key term
Fine volcanic rock and glass particles carried through the atmosphere after an eruption. Volcanic ash particles are smaller than 2 mm.
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Specification 3.2.1 · Component 1
Revise: Impacts of Tectonic ProcessesAsh clouds contain fine fragments of volcanic rock and glass, not the soft ash produced by burning wood. Winds can carry them hundreds or thousands of kilometres. Falling ash can load roofs until they collapse, damage crops and make roads difficult to use.
Describe both the characteristics and reach of volcanic hazards. An ash cloud spreads through the atmosphere; a pyroclastic flow travels along the ground.
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