10 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
pumice
Natural environment; Volcano
Light-colored, frothy volcanic rock, usually of dacite or rhyolite composition, formed by the expansion of gas in erupting lava. Commonly seen as lumps or fragments of pea-size and larger, but can ...
pyroclastic
Natural environment; Volcano
Pertaining to fragmented (clastic) rock material formed by a volcanic explosion or ejection from a volcanic vent.
pyroclastic flow
Natural environment; Volcano
Lateral flowage of a turbulent mixture of hot gases and unsorted pyroclastic material (volcanic fragments, crystals, ash, pumice, and glass shards) that can move at high speed (50 to 100 miles an ...
quaternary
Natural environment; Volcano
The period of Earth's history from about 2 million years ago to the present; also, the rocks and deposits of that age.
relief
Natural environment; Volcano
The vertical difference between the summit of a mountain and the adjacent valley or plain.
renewed volcanism state
Natural environment; Volcano
Refers to a state in the evolution of a typical Hawaiian volcano during which --after a long period of quiescence--lava and tephra erupt intermittently. Erosion and reef building continue.
