it came from the depths of the earth. due to extreme heat, rocks dissolve and they turn into magma.
--------------------------------------------------------------------------------------------------------
Magma is formed when pre-existing rock melts. This happens either by convection of the rock up through the mantle or by melting rock at a subduction zone. This may be a bit clearer. Magma is molten rock that is found beneath the surface of the Earth, and may also exist on other planets. Melting of solid rock to form magma is controlled by three physical parameters: temperature, pressure, and composition. You can find more information here:http://en.wikipedia.org/wiki/Magma#Melti...
Magma is a product of heat from Earth's interior along with decompression melting of rising mantle rock associated with mantle plumes and the water induced melting of subducted and saturated oceanic crust at convergent plate boundaries.
Lava is produced by volcanic ash. The magma underneath the surface rises until it meets with the ash. Then, slowly it grinds together and BOOM! There it is, your lava, homemade. this was done by: Davey Burgess
Three processes:
1. pressure release
2. volatile addition
3. heat transfer
Magma a hot molten underground rock. Igneous rocks are the solidified form of magma. Examples of these are granite, peridotite, basalt and obsidian.
heat and tention in yhe interior of the earth
Magma is a mixture of molten or semi-molten rock, volatiles, and solids. This mixture is found beneath the surface of the Earth. When it comes out of a volcano, it is known as lava.
magma can be generated from solid rock by three things:1. decress in PRESSURE2. increase in TEMPATURE3. addition of VOLATILES
decompression melting
It is called contact metamorphism.
The tectonic plates float on top of magma, and within the magma are convection currents which result from heat generated by radioactive decay of various isotopes found within the interior of the Earth.
Metamorphic rocks are buried deep inside Earth. There is enough heat and pressure to change the rocks, but not enough to melt it into magma. Metamorphic rocks can form adjacent to layers of magma, because of the generated heat, however
magma can be generated from solid rock by three things:1. decress in PRESSURE2. increase in TEMPATURE3. addition of VOLATILES
decompression melting
A process that alters rocks as a result of heat generated from magma
It is called contact metamorphism.
The earthquakes are generated by magma forcing its way though and fracturing rock.
It is called contact metamorphism.
The tectonic plates float on top of magma, and within the magma are convection currents which result from heat generated by radioactive decay of various isotopes found within the interior of the Earth.
Metamorphic rocks are buried deep inside Earth. There is enough heat and pressure to change the rocks, but not enough to melt it into magma. Metamorphic rocks can form adjacent to layers of magma, because of the generated heat, however
contact metamorphism
No, magma is not material from the core of the Earth. Magma is molten rock that is generated in the Earth's mantle, which lies between the core and the crust. Magma can rise to the surface during volcanic eruptions, forming lava flows or erupting explosively.
Magma is generated within Earth's mantle, the thick layer between Earth's crust and outer core. Rock found deep within the crust is extremely hot, soft, and pliable, but rock does not become liquid until much deeper in the upper mantle. Pockets, or chambers of magma, can originate at various depths within the earth. The composition of the magma varies and indicates the source materials and depth from which they originated. Silicondioxide (SiO2) is the predominant ingredient.
No, the Earth's mantle is to deep and warm for this. Magmas are generated in the upper mantle by a process called partial melting and the melt collects in the crust (in magma chambers at varying depth).