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.

Industry: Natural environment

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Volcano

Holocene

Natural environment; Volcano

The time period from 10,000 years ago to the present. Also, the rocks and deposits of that age.

Graben

Natural environment; Volcano

An elongate crustal block that is relatively depressed (downdropped) between two fault systems.

Seismometer

Natural environment; Volcano

An instrument that measures motion of the ground caused by earthquake waves.

Tephrochronology

Natural environment; Volcano

The collection, preparation, petrographic description, and approximate dating of tephra.

Trachyandesite

Natural environment; Volcano

An extrusive rock intermediate in composition between trachyte and andesite.

Spatter cone

Natural environment; Volcano

A low, steep-sided cone of spatter built up on a fissure or vent. It is usually of basaltic material.

Caldera

Natural environment; Volcano

The Spanish word for cauldron, a basin-shaped volcanic depression; by definition, at least a mile in diameter. Such large depressions are typically formed by the subsidence of volcanoes. Crater ...