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Volcano
A vent or opening in a planet's surface that lets out pressurized molten rocks or magma, and gases from the inner core. Volcanoes come in various shapes and structure, but the most common ones are mountain-like structures with a crater at the summit.
Industry: Natural environment
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Volcano
dacite
Natural environment; Volcano
Volcanic rock (or lava) that characteristically is light in color and contains 62% to 69% silica and moderate a mounts of sodium and potassium.
debris avalanche
Natural environment; Volcano
A rapid and unusually sudden sliding or flowage of unsorted masses of rock and other material. As applied to the major avalanche involved in the eruption of Mount St. Helens, a rapid mass movement ...
debris flow
Natural environment; Volcano
A mixture of water-saturated rock debris that flows downslope under the force of gravity (also called lahar or mudflow).
detachment plane
Natural environment; Volcano
The surface along which a landslide disconnects from its original position.
Devonian
Natural environment; Volcano
A period of time in the Paleozoic Era that covered the time span between 400 and 345 million years.
diatreme
Natural environment; Volcano
A breccia filled volcanic pipe that was formed by a gaseous explosion.
dike
Natural environment; Volcano
A sheetlike body of igneous rock that cuts across layering or contacts in the rock into which it intrudes.
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