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Volcanoes explained National Geographic ~ The majority of volcanoes in the world form along the boundaries of Earths tectonic plates—massive expanses of our planets lithosphere that continually shift bumping into one another When tectonic plates collide one often plunges deep below the other in whats known as a subduction zone
What Happens When a Volcano Erupts ~ Volcanoes do major work in building up continents and islands fashioning deepocean mountains and craters They also resurface landscapes on Earth as they spew out lava and other materials Earth began its life as a volcanic world covered with a molten ocean
How Do Volcanoes Erupt ~ Volcanic eruptions are among Earth’s most dramatic and powerful agents of change Ash mudflows and lava flows can devastate communities near volcanoes and cause havoc in areas far downwind downstream and downslope Even when a volcano is quiet steep volcanic slopes can collapse to become landslides and large rocks can be hurled by
Volcanoes in the US – Disasters Waiting To Happen ~ Volcanoes also do not always seem to erupt through the seams of these plates The Hawaiian Islands seemed to have been formed by a “hot spot” burning its way many times through the middle of a northwesternmoving Pacific plate as it passed
What Causes a Volcano to Erupt Owlcation ~ Volcano eruptions happen when magma erupts from beneath the Earths crust When a volcano erupts the magma becomes lava and shoots into the air eventually running down the side of the volcano To understand how and why volcanoes erupt we must first understand the different layers of our planet
How Do Volcanoes Occur ~ Volcanoes occur when molten rock from underneath the Earths crust rises up This molten rock comes from the mantle not from the Earths core Because of plate tectonics volcanoes can form relatively quickly The interior of the Earth is so hot that rocks are melted and much of this heat radiates to the mantle as well
Volcano Wikipedia ~ A volcano is a rupture in the crust of a planetarymass object such as Earth that allows hot lava volcanic ash and gases to escape from a magma chamber below the surface Earths volcanoes occur because its crust is broken into 17 major rigid tectonic plates that float on a hotter softer layer in its mantle
How do volcanoes happen Answers ~ Source Wikipedia A volcano is an opening or rupture in a planets surface or crust which allows hot molten rock ash and gases to escape from below the surface Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time
Where Do Most Volcanoes Occur ~ Most volcanoes occur in the basin of the Pacific Ocean also known as the Ring of Fire Most volcanoes are situated on the edges of tectonic plates One of the largest of these tectonic plates the Pacific plate is the area around which the majority of volcanoes lie According to National Geographic
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