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.
Bomb, Mt. Etna, approx. 60 cm. Photo: J. Alean.
Updated 2007-03-15 · © Stromboli online · J. Alean · R. Carniel · M. Fulle
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