Volcanoes are constructive forces in that they create new land, fertilize existing lands and bring many new minerals to the surface of the planet. Volcanoes also bring heat to the areas surrounding them and attract wildlife on land and beneath the sea.Know More
Volcanoes create new land when molten rock, or magma, flows up from inside of the planet. The magma emerges as lava, and as it cools, it solidifies into rock again and creates new land. In the case of island volcanoes, these lava flows extend the edges of the island out into the ocean. However, just as with land-based volcanoes, many developed areas are also covered in lava during the process.
Volcanic rocks, when worn down and weathered into the dirt, create rich soils that are ideal for farming a variety crops. Volcanic eruptions also bring precious metals and minerals to the surface where it can be harvested, such as gold, silver, sulfur and diamonds.
Volcanoes also construct amazing structures at the bottom of the deepest parts of the ocean. These volcanoes often form gigantic underwater structures of condensed minerals, and some grow large enough to reach up and out of the sea to form entirely new islands. Volcanoes are also constructive to scientists and their overall understanding of the internal workings of the planet.Learn more about Volcanoes
The three ways that magma can be formed are through heat transfer, decompression melting and flux melting. The process of magma creation is referred to by geologists as magmagenesis and occurs at the upper mantle of the Earth's crust due to plate tectonic effects.Full Answer >
Volcanoes can be formed three ways. These include inter-plate activity, where magma pushes up between cracks in tectonic plate boundaries; the drift of hotspots in continental plates, which pushes magma through the surface; and magma chambers opening up beneath the earth, which cracks the surface and forms volcanoes.Full Answer >
Volcanoes erupt due to pressure that the weight of the rocks puts on the magma and forces it to the surface out any available vent or exit provided to it. The magma is in a reservoir like area under the surface and the pressure from the rocks causes the less dense magma to move into any available crack or fissure that it can reach to try to release in some fashion. The magma can even melt its way to the surface if no exit is available for it at the time.Full Answer >
The name for volcanoes forming at hot spots is seamount: these volcanoes form along ridges on sea floors, and may rise high above the sea's surface, creating islands. Seamounts span among the greatest distances of all landforms on Earth, according to National Geographic. They cover vast stretches of land, generally protruding upwards from ocean crusts, although they sometimes appear beneath continents too.Full Answer >