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During the exceptionally high fountaining episodes of some [[eruption]]s, an extremely [[vesicular]], feathery light [[pumice]], called reticulite or thread-lace [[scoria]], can form and be carried many miles downwind from the high [[lava]] fountains. Even though reticulite is the least dense kind of [[tephra]], it does not float on water, because its vesicles are open and interconnected. Consequently, when it falls on water, it becomes easily waterlogged and sinks. (Tilling, Heliker, and Wright, 1987) <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>

[[Image:Reticulite.jpg|thumb|300px|Reticulite erupted from Kilauea Volcano, Hawai`i.]]During the exceptionally high fountaining episodes of some [[eruption]]s, an extremely [[vesicular]], feathery light [[pumice]], called reticulite or thread-lace [[scoria]], can form and be carried many miles downwind from the high [[lava]] fountains. Even though reticulite is the least dense kind of [[tephra]], it does not float on water, because its vesicles are open and interconnected. Consequently, when it falls on water, it becomes easily waterlogged and sinks. (Tilling, Heliker, and Wright, 1987) <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>

==References==

==References==

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