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A hot (300-800 degrees C (570-1470 degrees F)), dry, fast-moving (10 to more than 100 meters per second (20 to more than 200 miles per hour)) and high-density mixture of [[ash]], [[pumice]], [[rock]] fragments, and gas formed during explosive eruptions or from the collapse of a lava dome. Moves away from a [[volcano]] at high speeds. <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>
A hot (300-800 degrees C (570-1470 degrees F)), dry, fast-moving (10 to more than 100 meters per second (20 to more than 200 miles per hour)) and high-density mixture of [[ash]], [[pumice]], [[rock]] fragments, and gas formed during explosive eruptions or from the collapse of a lava dome. Moves away from a [[volcano]] at high speeds. <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>
Pyroclastic flows are arguably the most dangerous of all volcanic flows, due to their fast speed and destructive power.
==References==
==References==