6 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
Eruption cloud
Natural environment; Volcano
The column of gases, ash, and larger rock fragments rising from a crater or other vent. If it is of sufficient volume and velocity, this gaseous column may reach many miles into the stratosphere, ...
Echelon
Natural environment; Volcano
Set of geologic features that are in an overlapping or a staggered arrangement (e.g., faults). Each is relatively short, but collectively they form a linear zone in which the strike of the ...
Extrusion
Natural environment; Volcano
The emission of magmatic material at the earth's surface. Also, the structure or form produced by the process (e.g., a lava flow, volcanic dome, or certain pyroclastic rocks).
Fault
Natural environment; Volcano
A crack or fracture in the earth's surface. Movement along the fault can cause earthquakes or--in the process of mountain-building--can release underlying magma and permit it to rise to the surface.
Extinct volcano
Natural environment; Volcano
A volcano that is not presently erupting and is not likely to do so for a very long time in the future.
Ejecta
Natural environment; Volcano
Material that is thrown out by a volcano, including pyroclastic material (tephra) and lava bombs.
Episode
Natural environment; Volcano
An episode is a volcanic event that is distinguished by its duration or style.
