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Lava bomb, ejected from the Kīlauea Volcano, Hawaii in 1983"Fusiform" type volcanic bomb. Capelinhos Volcano, Faial Island, Azores"Almond" type volcanic bomb found in the Cinder Cones region of the Mojave National Preserve"Bread-crust" type volcanic bomb at Vulcania, Puy-de-Dôme, FranceLava bomb at Strohn, Rhineland-Palatinate, Germany, with a diameter of 5 metres and a mass of 120 tonnes. It was caused by a volcanic eruption in 8300 BC[citation needed].
A volcanic bomb or lava bomb is a mass of partially molten rock (tephra) larger than 64 mm (2.5 inches) in diameter, formed when a volcano ejects viscous fragments of lava during an eruption. Because volcanic bombs cool after they leave the volcano, they are 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 (16-20 ft) in diameter up to 600 m (2,000 ft) 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. On July 16, 2018, 23 people were injured on a tour boat near the Kilauea volcano as a result of a basketball-sized lava bomb from the 2018 lower Puna eruption.[1][2]
Volcanic bombs are known to occasionally explode from internal gas pressure as they cool, but in most cases, most of the damage they cause is from impact, or subsequent fire damage. Bomb explosions are most often observed in "bread-crust" type bombs.
^"Hawaii volcano: At least 23 injured as 'lava bomb' hits tourist boat". USA Today. Retrieved 17 July 2018.
^"23 injured after basketball-sized 'lava bomb' crashes through roof of Hawaiian tour boat". The Washington Post.
A volcanicbomb or lava bomb is a mass of partially molten rock (tephra) larger than 64 mm (2.5 inches) in diameter, formed when a volcano ejects viscous...
Several types of volcanic eruptions—during which material is expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These...
estimated that volcanic rocks cover about 8% of the Earth's current land surface. Lava Tephra Volcanicbomb Lapilli Volcanic ash Volcanic rocks are usually...
within the vent, creating a volcanic plug which can result in highly explosive eruptions.[citation needed] Volcanicbombs are extrusive igneous rocks...
material for dangerous lahars. Large pieces of tephra are called volcanicbombs. Big bombs can measure more than 4 feet (1.2 meters) across and weigh several...
eruptions consist of ejection of incandescent cinders, lapilli, and volcanicbombs, to altitudes of tens to a few hundreds of metres. The eruptions are...
volcanicbomb when molten, or a volcanic block when solid. Pyroclastic material with particles less than 2 mm in diameter is referred to as volcanic ash...
In a volcanic eruption, lava, volcanicbombs, ash, and various gases are expelled from a volcanic vent and fissure. While many eruptions only pose dangers...
are dangerous to persons within several hundred metres of the vent. Volcanicbombs are common products of this type of eruption. These are initially molten...
off large blocks from the main cone that had broken off, as well as volcanicbombs. "The viscosity of the lava fragments ejected by the blasts was, for...
produced by a volcanic eruption Tuff – Rock consolidated from volcanic ash Volcano – Rupture in a planet's crust where material escapes Volcanicbomb – Mass...
to steam, resulting in an explosion of steam, water, ash, rock, and volcanicbombs. At Mount St. Helens in Washington state, hundreds of steam explosions...
inches) in diameter Lapilli or volcanic cinders – between 2 and 64 mm (0.08 and 2.5 inches) in diameter Volcanicbombs or volcanic blocks – larger than 64 mm...
Pluton in Vermont Peridotite (green) mantle xenolith within a (dark) volcanicbomb from Vulkaneifel, Germany (coin of one euro for scale) Rounded, yellow...
impact and breakage of volcanicbombs (a bomb is a block with streamlined appearance, often expelled in a molten state). Bombs can also occur due to the...
cooling in volcanic or hypabyssal (shallow subsurface) environments. As a rule, the texture of these rocks is not the same as that of volcanic glass (e...
is added to a tectonic plate or landmass. achnelith A small, glassy volcanicbomb, sphere, dumbbell, or droplet-shaped stone resulting from very liquid...
Volcanic cones are among the simplest volcanic landforms. They are built by ejecta from a volcanic vent, piling up around the vent in the shape of a cone...
The Carrizozo volcanic field is a monogenetic volcanic field located in New Mexico, US. The volcanic field consists of two lava flows, the Broken Back...
becoming volcanicbombs. These can travel with so much energy that large ones can create craters when they hit the ground. When an emulsion of volcanic gas...
Mount Erebus and are ejected out of the mountain encased in glassy volcanicbombs. This glass structure quickly weathers away leaving the mountainside...
(little stones from 1/10 to 2+1⁄2 inches or 0.25 to 6.35 centimetres) to volcanicbombs (>2.5 inches [6.4 cm]). In planetary geology, the term "ejecta" includes...
These phreatic explosions generated ballistic volcanicbombs that fell near the summit craters and fine volcanic ash that fell up to 25 km away. In prehistoric...
Big Pine volcanic field is a volcanic field in Inyo County, California. The volcanic field covers a surface area of 500 square kilometres (190 sq mi)...
Volcanism, vulcanism, volcanicity, or volcanic activity is the phenomenon where solids, liquids, gases, and their mixtures erupt to the surface of a solid-surface...
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