3 Terms
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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
phreatic explosion
Natural environment; Volcano
An explosive volcanic eruption caused when water and heated volcanic rocks interact to produce a violent expulsion of steam and pulverized rocks. Magma is not involved.
phreatomagmatic
Natural environment; Volcano
An explosive volcanic eruption that results from the interaction of surface or subsurface water and magma.
pillow lava
Natural environment; Volcano
Interconnected, sack-like bodies of lava formed underwater.
pipe
Natural environment; Volcano
A vertical conduit through the Earth's crust below a volcano, through which magmatic materials have passed. Commonly filled with volcanic breccia and fragments of older rock.
pit crater
Natural environment; Volcano
A crater formed by sinking in of the surface, not primarily a vent for lava.
plate tectonics
Natural environment; Volcano
The theory that the earth's crust is broken into about 10 fragments (plates,) which move in relation to one another, shifting continents, forming new ocean crust, and stimulating volcanic eruptions.
