Changes

Similar to a pyroclastic flow but of much lower density (higher gas to rock ratio). (Gardner, et.al., 1995)  

Similar to a [[pyroclastic flow]] but of much lower [[density]] (higher gas to rock ratio). (Gardner, et.al., 1995)  

Turbulent, low-density cloud of hot rock debris and gases that moves over the ground surface at high speed. <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>

Turbulent, low-density cloud of hot rock debris and gases that moves over the ground surface at high speed. <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>

==References==

==References==

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