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...

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 Volcanic bomb Lapilli Volcanic ash Volcanic rocks are usually...

within the vent, creating a volcanic plug which can result in highly explosive eruptions.[citation needed] Volcanic bombs are extrusive igneous rocks...

eruptions consist of ejection of incandescent cinders, lapilli, and volcanic bombs, to altitudes of tens to a few hundreds of metres. The eruptions are...

cone, volcanic crater, and volcanic bomb. Scientific journals have studied the volcanic geology of the area, identifying the rocks of volcanic appearance...

material for dangerous lahars. Large pieces of tephra are called volcanic bombs. Big bombs can measure more than 1.2 meters (4 ft) across and weigh several...

volcanic bomb when molten, or a volcanic block when solid. Pyroclastic material with particles less than 2 mm in diameter is referred to as volcanic ash...

are dangerous to persons within several hundred metres of the vent. Volcanic bombs are common products of this type of eruption. These are initially molten...

In a volcanic eruption, lava, volcanic bombs, ash, and various gases are expelled from a volcanic vent and fissure. While many eruptions only pose dangers...

(meteorology) Bomb calorimeter Volcanic bomb, a mass of molten rock ejected from a volcano Bomb (American football), a distinctly arching pass Bomb (kick),...

Peléan eruptions are a type of volcanic eruption. They can occur when viscous magma, typically of rhyolitic or andesitic type, is involved, and share some...

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 volcanic bomb, sphere, dumbbell, or droplet-shaped stone resulting from very liquid...

inches) in diameter Lapilli or volcanic cinders – between 2 and 64 mm (0.08 and 2.5 inches) in diameter Volcanic bombs or volcanic blocks – larger than 64 mm...

Pluton in Vermont Peridotite (green) mantle xenolith within a (dark) volcanic bomb from Vulkaneifel, Germany (coin of one euro for scale) Rounded, yellow...

to steam, resulting in an explosion of steam, water, ash, rock, and volcanic bombs. At Mount St. Helens in Washington state, hundreds of steam explosions...

produced by a volcanic eruption Tuff – Rock consolidated from volcanic ash Volcano – Rupture in a planet's crust where material escapes Volcanic bomb – Mass...

off large blocks from the main cone that had broken off, as well as volcanic bombs. "The viscosity of the lava fragments ejected by the blasts was, for...

impact and breakage of volcanic bombs (a bomb is a block with streamlined appearance, often expelled in a molten state). Bombs can also occur due to the...

Small volcanic bomb of (black) basanite with (green) dunite...

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...

becoming volcanic bombs. These can travel with so much energy that large ones can create craters when they hit the ground. When an emulsion of volcanic gas...

The volcanic explosivity index (VEI) is a relative measure/prediction of the explosiveness of volcanic eruptions. It was devised by Christopher G. Newhall...

These phreatic explosions generated ballistic volcanic bombs that fell near the summit craters and fine volcanic ash that fell up to 25 km away. In prehistoric...

(little stones from 1/10 to 2+1⁄2 inches or 0.25 to 6.35 centimetres) to volcanic bombs (>2.5 inches [6.4 cm]). In planetary geology, the term "ejecta" includes...

fragmental, typically glassy material which falls as volcanic ash, lapilli, and volcanic bombs. E.J. Tarbuck and F.K. Lutgens, Earth An introduction...

Mount Erebus and are ejected out of the mountain encased in glassy volcanic bombs. This glass structure quickly weathers away leaving the mountainside...

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...