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The primary threat from a shield volcano is flowing lava. These flows generally move fairly slowly. While they can be destructive, people can usually evacuate in time without much difficulty. Composite volcanoes produce a variety of hazards, the most dangerous of which are pyroclastic flows. These superheated avalanches of ash, rock, and gas can moved at well over 100 mph, scorching everything in their path and giving no time to escape. There are also mudflows called lahars that can bury villages and falling ash that can collapse roofs and clog the lungs

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11y ago

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