5 days ago · 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 …

Jan 2, 2026 · Strictly speaking, the term volcano means the vent from which magma and other substances erupt to the surface, but it can also refer to the landform created by the …

For details on the specific effects of plate tectonics, see the articles earthquake and volcano. A detailed treatment of the various land and submarine relief features associated with plate …

A volcano forms when magma beneath the Earth's crust forces its way to the surface. Alternating layers of solidified lava and pyroclastic materials (ash and cinders) build up the typical cone …

3 days ago · Volcano - Eruptions, Types, Magma: Volcanoes are frequently classified by their size and shape (as is described in the section Volcanic landforms), but they can also be classified …

What Causes a Volcano to Erupt? Volcanic eruptions are caused by convection in Earth’s mantle and crust.

Nov 26, 2025 · volcanic eruption, an eruption of molten rock, hot rock fragments, and hot gases through a volcano, which is a vent in a planet’s or satellite’s crust. Volcanic eruptions can …

Jan 2, 2026 · The common mental image of a volcano is that of a steep symmetrical cone sweeping upward in a concave curve to a sharp summit peak. Mount Fuji in Japan is the …

Dec 31, 2025 · Soufrière Hills, Montserrat Volcano in the Soufrière Hills of Montserrat, erupting on January 23, 2010. volcanism, any of various processes and phenomena associated with the …

When a volcano erupts, hot gases and melted rock from deep within Earth find their way up to the surface. This material may flow slowly out of a fissure, or crack, in the ground, or it may …