Changes

Jump to: navigation, search

Pumice

127 bytes added, 06:00, 10 July 2007
Removing cut and paste formatting. Adding links.
*A light-colored, frothy volcanic rock, usually of [[dacite ]] or [[rhyolite ]] composition, formed by the expansion of gas in erupting [[lava]]. Commonly perceived as lumps or fragments of pea size and larger but can also occur abundantly as ash-size particles. <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology (Foxworthy and Hill, 1982) ]</ref>  *Because of its numerous gas bubbles, pumice commonly floats on water. <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>
==References==
<references/>
1,129
edits