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A volcanic plug, also called a volcanic neck or lava neck, is a volcanic object created when magma hardens within a vent on an active volcano. When present...

Magma (from Ancient Greek μάγμα (mágma) 'thick unguent') is the molten or semi-molten natural material from which all igneous rocks are formed. Magma...

Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface...

be obtained in two ways: by high levels of silica in the magma, or by degassing of fluid magma. Since viscous basaltic and andesitic domes weather fast...

solidify within the vent, creating a volcanic plug. Volcanic plugs can trap gas and create pressure in the magma chamber, resulting in violent eruptions. Lava...

about 370 m (1,210 ft) over the surrounding terrain. The volcanic plug was formed by magma solidifying in the vent of an active volcano. The nearest village...

into the magma chamber. When the caldera is subsequently emptied by explosive volcanic activity, the roof of the magma chamber collapses as a plug of rock...

as volcanic plugs of magma which welled up and solidified inside softer rock which has since eroded away.[citation needed] Every plug, with the exception...

with the magma penetrating the least competent beds, such as shale beds. Ring dikes and cone sheets form only at shallow depth, where a plug of overlying...

viscous magma such that expelled lava violently froths into volcanic ash when pressure is suddenly lowered at the vent. Sometimes a lava plug will block...

is part of the Mount Taylor volcanic field. A volcanic neck or plug is formed when magma from an existing volcano solidifies in the pipe or neck and the...

plutonic rock), larger than 100 km2 (40 sq mi) in area, that forms from cooled magma deep in the Earth's crust. Batholiths are almost always made mostly of felsic...

it features front axle four-link and rear axle five-link suspension. A plug-in hybrid version was introduced at the January 2015 North American International...

coefficient for rock (c. 5.7×10−5 °C−1), T1 is the temperature of ascending magma compared to the temperature at the upper boundary (c. 1220 °C for the Atlantic...

roughly 10 billion tonnes (1.1×1010 short tons) or 10 km3 (2.4 cu mi) of magma, bringing large amounts of minerals and toxic metals to the surface. It...

Robot Masters—Concrete Man, Tornado Man, Splash Woman, Plug Man, Jewel Man, Hornet Man, Magma Man and Galaxy Man—Light is soon arrested. During the victory...

their exact emplacement, but some, at least, are probably plugs of solidified intrusive magma. Magnetic anomalies on the northeast flank of the core area...

content makes rhyolitic magma extremely viscous. This favors explosive eruptions over effusive eruptions, so this type of magma is more often erupted as...

eruption, wherein magma is violently fragmented and rapidly expelled from a volcano. Effusive eruptions are most common in basaltic magmas, but they also...

forming about 70,000 years ago, and most have eroded, leaving plugs of hardened magma that form rounded hilltops known as puys. The last confirmed eruption...