Volcano - Wikipedia The most common perception of a volcano is of a conical mountain, spewing lava and poisonous gases from a crater at its summit; however, this describes just one of the many types of volcano The features of volcanoes are varied The structure and behaviour of volcanoes depend on several factors
Volcano | Definition, Types, Facts | Britannica Volcano, vent in the crust of Earth or another planet or satellite, from which issue eruptions of molten rock, hot rock fragments, and hot gases The term volcano can also refer to the landform created by the accumulation of solidified lava and volcanic debris near the vent
Whats erupting? List map of currently active volcanoes List map of currently active volcanoes Notes: The status colors of volcanoes are our subjective interpretation of activity status (unrest, alert, erupting, major eruption) and have no official significance, although we try to keep them in agreement with various existing official color and alert codes
About Volcanoes | U. S. Geological Survey - USGS. gov Molten rock below the surface of the Earth that rises in volcanic vents is known as magma, but after it erupts from a volcano it is called lava Magma is made of molten rock, crystals, and dissolved gas—imagine an unopened bottle of soda with grains of sand inside
Anatomy of a Volcano - U. S. National Park Service Volcanoes are both the vents where molten rock material and volcanic gases are erupted from within Earth’s interior, and the cones and mountains built up around those vents But beyond this simple definition, volcanoes are incredibly diverse with some types being very complex
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