Difference between revisions of "Volcanic bombs"
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[http://volcanoes.usgs.gov/Products/Pglossary/bomb.html USGS Photo Glossary] | [http://volcanoes.usgs.gov/Products/Pglossary/bomb.html USGS Photo Glossary] | ||
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Revision as of 22:30, July 14, 2007
'Volcanic bombs are lava fragments that were ejected while viscous (partially molten) and larger than 64 mm in diameter. Many acquire rounded aerodynamic shapes during their travel through the air. Volcanic bombs include breadcrust bombs, ribbon bombs, spindle bombs (with twisted ends), and spheroidal bombs.