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Q: As magma cools
A: Magma (from Greek ????? "mixture") is a mixture of molten or semi-molten rock, volatiles and solids[1] that is found beneath the surface of the Earth, and is expected to exist on other terrestrial planets. [ Besides molten rock, magma may also contain suspended crystals, dissolved gas and sometimes gas bubbles. Magma often collects in magma chambers that may feed a volcano or turn into a pluton.
Magma is capable of intrusion into adjacent rocks, extrusion onto the surface as lava, and explosive ejection as tephra to form pyroclastic rock. Magma is a complex high-temperature fluid substance. Temperatures of most magmas are in the range 700 ?C to 1300 ?C (or 1300 ?F to 2400 ?F), but very rare carbonatite melts may be as cool as 600 ?C, and komatiite melts may have been as hot as 1600 ?C. Most are silicate mixtures. ]
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User: When magma cools off earth surface which type of crystalline structure is usually found

User: As magma cools

Weegy: Magma (from Greek ????? "mixture") is a mixture of molten or semi-molten rock, volatiles and solids[1] that is found beneath the surface of the Earth, and is expected to exist on other terrestrial planets. [ Besides molten rock, magma may also contain suspended crystals, dissolved gas and sometimes gas bubbles. Magma often collects in magma chambers that may feed a volcano or turn into a pluton. Magma is capable of intrusion into adjacent rocks, extrusion onto the surface as lava, and explosive ejection as tephra to form pyroclastic rock. Magma is a complex high-temperature fluid substance. Temperatures of most magmas are in the range 700 ?C to 1300 ?C (or 1300 ?F to 2400 ?F), but very rare carbonatite melts may be as cool as 600 ?C, and komatiite melts may have been as hot as 1600 ?C. Most are silicate mixtures. ]
axienaSUN|Points 55|

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Asked 6/29/2013 3:45:10 PM
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