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 in Volcanoes
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 >
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 >
A fissure volcano, or fissure vent eruption, occurs when lava erupts through an elongated break in the rock at the surface of the earth. Fissure vent eruptions are common in the mid-ocean ranges. Also known as shield volcanoes, they produce pillow basalt formations such as those that make up the Hawaiian Islands.Full Answer >
Volcanoes occur when magma and heated gases from below the Earth's crust are channeled to the surface through fissures in the crust layer. Magma is molten rock that is called lava once it reaches the surface.Full Answer >