Volcanic Bomb

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Volcanic Bomb

 

a clump of lava, ejected during an eruption in a liquid or plastic state, which takes on one or another form in flight. Volcanic bombs are 1 cm to 7 m long. The most important of the many forms of volcanic bombs are the waferlike forms, characteristic of very liquid lava, clumps of which are flattened as they fall to the earth; twisted, spindlelike, pearlike, globular, and ribbon-shaped forms, characteristic of low-viscosity basaltic lavas, which harden in flight; and round or irregular multifaceted clumps of lava covered with a network of cracks—bread-crust bombs— characteristic of hardened acidic and andesite lavas.

References in periodicals archive ?
During some particularly active periods--as in 2005 and 2006, when Erebus was regularly flinging lava bombs up and over the crater rim--such slugs explode throughout the day for weeks or months.
There was a time when they thought Etna was home to a Cyclops blindly throwing lava bombs.
The mountain showers the cast with increasing numbers spectacular lava bombs and sparks a tsunami.
There were lava bombs as big as your head," he said, describing globs of semi-molten sulfur.
Nuee ardentes, or pyroclastic flows combine glowing ash, fist to house-sized lava bombs and superheated gases that explode out from erupting volcanoes.
Visitors will learn about geodes, lava bombs, crystals, obsidian and more at various geology stations.
The molten world of Flamar is strewn with vicious volcanoes spewing lava bombs, and Trade World is a manic metropolis packed with evil criminals.
gags that Jackson bombards us with like so many flying lava bombs, apart from a highbrow Hieronymus Bosch reference that drops out of nowhere, they're neither as clever nor as apt as those Steve Martin wrote for Jackson's last assault on our fair city, ``L.
This creates the predictable panic and mayhem, but the most unexpected result is a fiery geyser that erupts from the bubbling La Brea Tar Pits, sending meteor-like lava bombs skyrocketing and then back to the ground, filling the night air with cascading ash and finally producing a lava flow that heads right onto Wilshire Boulevard alongside the L.