Volcano

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.

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Volcano

dome

Natural environment; Volcano

A steep-sided mass of viscous (doughy) lava extruded from a volcanic vent (often circular in plane view) and spiny, rounded, or flat on top. Its surface is often rough and blocky as a result of ...

dormant volcano

Natural environment; Volcano

Literally, "sleeping. " The term is used to describe a volcano which is presently inactive but which may erupt again. Most of the major Cascade volcanoes are believed to be dormant rather than ...

drainage basin

Natural environment; Volcano

The area of land drained by a river system.

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 ...

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.

eruption

Natural environment; Volcano

The process by which solid, liquid, and gaseous materials are ejected into the earth's atmosphere and onto the earth's surface by volcanic activity. Eruptions range from the quiet overflow of liquid ...