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As rising superheated mantle rock nears the surface due to tectonic forces, the compression pressure from surrounding rock decreases, causes it to melt, forming magma. It's called decompression melting. The high pressures that keep the superhot mantle rock from melting in the first place are called lithostatic pressures.
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∙ 14y ago
Wiki User
∙ 8y agoIt controls whether or not a rock will melt.
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What does NOT play a role in magma formation?
Tephra Type. (:
What mechanism is most responsible for generating the internal heat of lo that drives the volcanic activity?
The heat responsible for volcanic activity is essentially the magma within the mantle. Plate tectonics also a play a hug role in the formation of volcanoes, such as the plate boundary of which it was formed. The tectonics of the environment of which this volcano was derived will determine the way in which the magma/heat is formed.
As a volcano erupts what force pushes magma out of a volcano onto the surface?
Pressure does all the work when magma is pushed out of the volcano, because when gasses mix with the lava and certain minerals go into the lava, the heated gasses create a condensed pressure that blows all the lava out of the volcano.
What do rates of water evaporation depend on?
it depends on the current humidity, if the humidity is high the water will have trouble evaporating because it has no where to go, temperature and atmospheric pressure also play some part.
Why is magma in the center of earth?
Billions of years ago loads of rocks collided with each other creating friction. this created earth and the heat generated by the friction still hasn't died down, it melted rock and made magma. I still believe the melting of solid ro ck magma is a function of three variables, the pressure, composition and the resulting heat. Magma is constantly discharged and renewed this is the force behind sea floor spreading.
What does NOT play a role in magma formation?
Tephra Type. (:
Does pressure play a role in formation of metamorphic rocks?
yes
Do tornadoes form with variations of temperature?
Variations in temperature often play a role in the formation of tornadoes, but they are not the only factor.
What role does temperature and pressure play in ocean dynamics?
Juice fool.
Two factors that play a significant role in this type of weathering are?
Temperature and Pressure
Does pressure play a role in the formation of metamorphic rocks?
No it does not. They can only be converted from Sedimentary to Metamorphic be heat and pressure. Metamorphic can also convert to different higher great as the temperature and pressure increases. examsples are schist to gneiss.
What part do volcanoes play in the rock cycle?
Magma
What are the two main types of forces that help build a tornado?
Of true forces, pressure gradient force and buoyancy force play important roles in the formation of tornadoes.
What is the best formation to play with an under 13 soccer team?
the best formation is to consult the team and ask them where they would like to play
What formation should arsenal play next season?
arsenal should play 4-4-2 it is the most effective formation
How the planets contribute to land formation?
Planets play no role in land formation of the earth
What mechanism is most responsible for generating the internal heat of lo that drives the volcanic activity?
The heat responsible for volcanic activity is essentially the magma within the mantle. Plate tectonics also a play a hug role in the formation of volcanoes, such as the plate boundary of which it was formed. The tectonics of the environment of which this volcano was derived will determine the way in which the magma/heat is formed.
