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29 bytes added ,  17:51, December 30, 2009
Grammer y Formating
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Pertaining to fragmented ([[Clastic Sedimentary Rock|clastic]]) rock material formed by a volcanic explosion or ejection from a [[volcano|volcanic]] [[vent]]. (Foxworthy and Hill, 1982) <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>
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'''Pyroclastic''' is a term that refers to fragmented ([[Clastic Sedimentary Rock|clastic]]) rock material formed by a volcanic explosion or ejection from a [[volcano|volcanic]] [[vent]]. (Foxworthy and Hill, 1982) <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>
    
==References==
 
==References==
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