On Left - Plinian eruption: 1: ash plume, 2: magma conduit, 3: volcanic ash fall, 4: layers of lava and ash, 5: stratum, 6: magma chamber. On Right - Pompeii and other cities affected by the eruption of Mount Vesuvius. The black cloud represents the general distribution of ash and cinder. Modern coast lines are shown. (Left, CC BY-SA 4.0 / Right, CC BY-SA 3.0)
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