Free Online Dictionary
|Wikipedia English The Free Encyclopedia||Download this dictionary|
A volcanic bomb is a mass of molten rock (tephra) larger than 65 mm (2.5 inches) in diameter, formed when a volcano ejects viscous fragments of lava during an eruption. They cool into solid fragments before they reach the ground. Because volcanic bombs cool after they leave the volcano, they do not have grains making them extrusive igneous rocks. Volcanic bombs can be thrown many kilometres from an erupting vent, and often acquire aerodynamic shapes during their flight. Bombs can be extremely large; the 1935 eruption of Mount Asama in Japan expelled bombs measuring 5–6 m in diameter up to 600 m from the vent. Volcanic bombs are a significant volcanic hazard, and can cause severe injuries and death to people in an eruption zone. One such incident occurred at Galeras volcano in Colombia in 1993; six people near the summit were killed and several seriously injured by lava bombs when the volcano erupted unexpectedly.
|See more at Wikipedia.org...|
The following video provides you with the correct English pronunciation of the word "volcanic bomb", to help you become a better English speaker.
© This article uses material from Wikipedia® and is licensed under the GNU Free Documentation License and under the Creative Commons Attribution-ShareAlike License
| volcanic bomb in English | volcanic bomb in French | volcanic bomb in Italian | volcanic bomb in Spanish | volcanic bomb in Dutch | volcanic bomb in German | volcanic bomb in Korean | volcanic bomb in Turkish | volcanic bomb in Polish | volcanic bomb in Hungarian | volcanic bomb in Romanian | volcanic bomb in Farsi
You think you have ethics... Take the survey NOW!