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4 July, 16:28

A dense mix of dry, hot rock fragments and hot gas erupting from volcanic vents at high speed is

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  1. 4 July, 19:07
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    Pyroclastic Flow

    Explanation:

    A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that moves away from a volcano about 100 km/h (62 mph) on average but is capable of reaching speeds up to 700 km/h (430 mph).
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