Volcano Summary

Volcanoes Of the more than 1,500 potentially active volcanoes in the world, eight to ten are erupting at any given moment. On the bottom of the seabed circling the Pacific basin lies a series of volca... Read more

Volcanic Vent Volcanic vents are openings in Earth's crust where molten lava and volcanic gases escape onto the land surface or into the atmosphere. Most volcanoes have a circular central vent ... Read more

Volcano Volcanoes have been called the thermostat of the planet. They wreak havoc, but also spawn far-ranging benefits for soil and air. Some earth scientists now say that the vast swath of destruct... Read more

Composite Volcanoes Composite volcanoes are also known as strato volcanoes. Their formation consists of alternating layers of lava and rock. They occur along subduction zones and have many different... Read more

When magma beneath the Earth's surface is forced up through any opening in Earth's crust, it is called a volcano. Some pour or explode molten rock, ash, cinders, and poisonous gases. Volcanoes ar... Read more