Vents that issue volcanic material (including lava and ash) and gases (mainly steam and magmatic gases) can develop anywhere on the landform and may give rise to smaller cones …

Nov 26, 2025 · 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 …

Volcanoes are openings, or vents where lava, tephra (small rocks), and steam erupt onto the Earth's surface. Volcanic eruptions can last days, months, or even years.

Overview of our website: 1) Info about all active volcanoes in the world; 2) Volcano photos; 3) Earthquake information; 4) Tours and expeditions to active volcanoes, walking and study …

Volcanoes are Earth’s geologic architects. They’ve created more than 80 percent of our planet’s surface, laying the foundation that has allowed life to thrive. Their explosive force crafts...

May 21, 2025 · Volcanoes are classified as active, dormant, or extinct. Active volcanoes have a recent history of eruptions; they are likely to erupt again. Dormant volcanoes have not erupted …

Volcanic eruptions occur when molten lava reaches the surface of the Earth. When lava cools at the surface it is called extrusive igneous rock. Volcanism can both increase and decrease …

Articles, facts, information and photos for volcanoes and volcanic activity. | Geology.com

Mar 11, 2019 · Volcanoes are geological formations that result from the accumulation of molten rock, ash, and gases beneath the Earth’s surface. These materials are expelled through …

Jun 13, 2025 · It is within the mantle, especially in its upper regions, that most volcanic activity is born. Here, temperature and pressure conspire to partially melt rock, forming magma. This …