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The when it is inside the earth, the lava is called magma. It is composed of molten rock. It originates from the melting of rock in the mantle and the crust. How the material melts depends on the geologic setting. At divergent plate boundaries the crust becomes thinner, which reduces pressure on the mantle and lowers the melting point, causing some of it to melt. At subduction zones, volatile components such as water are introduced into the mantle, which also lowers the melting point. At hot spots, material rises from the hotter lower mantle to the upper mantle, and thus experiences lower pressure. The magma then rises through the crust to erupt from volcanoes. As the magma rises it sometimes melts some of the crust. Since some of the original magma solidifies this does not increase the total amount of magma but it is important in that it alters the magma's composition and thus its behavior.
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What do you call materials produced when a volcano erupts?
Lava
Layers of lava emitted by the volcano?
The different layers of a volcano are made from the lava and ash produced by the volcano. Some volcanoes have different thicknesses of layers or only one type of layer depending on the kind of eruption and how much ash it produces.
What type of volcano is made of layers of tephra and lava?
A stratovolcano.
The solidified lava of a volcano belongs to which rock family?
igneous rocks are made of solidified lava.
What type of lava does thera volcano have?
stinky lava and puny volcano
What do you call materials produced when a volcano erupts?
Lava
What type of volcano is Lava Creek tuff?
The Lava Creek Tuff was produced by a supervolcano.
Layers of lava emitted by the volcano?
The different layers of a volcano are made from the lava and ash produced by the volcano. Some volcanoes have different thicknesses of layers or only one type of layer depending on the kind of eruption and how much ash it produces.
What type of volcano is made from alternating layers of rock and lava?
The Composite volcano.
What type of volcano is made from alternating layers of lava and ash?
The composite volcano.
What type of volcano is made of layers of tephra and lava?
A stratovolcano.
Is composite volcano made of entirely running lava?
Shield Volcanoes are made out of running lava. Not composite.
What are the sides of the volcano made of?
dried up lava.
Volcanoes erupt hot liquid rock what type of rock is produced by volcanos?
Igneous rock... There are extrusive (formed on the exterior of a volcano by lava) and intrusive (formed on the inside of a volcano by magma).
The solidified lava of a volcano belongs to which rock family?
igneous rocks are made of solidified lava.
How are volcanic rocks produced?
A volcano is formed when the molten magma (lava) beneath the crust is forced to the surface. Volcanic rock is lava that has cooled.
Composite volcano?
A volcano whose cone is made up of alternate layers of ash and lava.
