Plate Tectonics Questions Medium
A volcano is a geological feature on the Earth's surface that is formed when molten rock, ash, and gases escape from beneath the Earth's crust through a vent or opening. This molten rock, known as magma, is formed by the melting of the Earth's mantle and rises to the surface due to its lower density compared to the surrounding rocks. When the magma reaches the surface, it is called lava. Volcanoes can be found on land or underwater and can vary in size and shape. They are typically characterized by a conical or mountain-like structure with a central vent or crater through which the magma is ejected. Volcanic eruptions can be explosive or effusive, depending on the viscosity of the magma. Volcanoes are often associated with various geological phenomena, such as earthquakes, geothermal activity, and the formation of new land.