Definitions for magmaˈmæg mə; -mə tə
This page provides all possible meanings and translations of the word magma
Random House Webster's College Dictionary
mag•maˈmæg mə; -mə tə(n.)(pl.)-mas, -ma•ta
molten material beneath or within the earth's crust, from which igneous rock is formed.
a mixture or suspension of mineral or organic matter.
Origin of magma:
1400–50; < L < Gk mágma salve
molten rock in the earth's crust
The molten matter within the earth, the source of the material of lava flows, dikes of eruptive rocks, etc.
A basic algebraic structure consisting of a set equipped with a single binary operation.
Origin: From μάγμα.
any crude mixture of mineral or organic matters in the state of a thin paste
a thick residuum obtained from certain substances after the fluid parts are expressed from them; the grounds which remain after treating a substance with any menstruum, as water or alcohol
a salve or confection of thick consistency
the molten matter within the earth, the source of the material of lava flows, dikes of eruptive rocks, etc
the glassy base of an eruptive rock
the amorphous or homogenous matrix or ground mass, as distinguished from well-defined crystals; as, the magma of porphyry
Magma is a mixture of molten or semi-molten rock, volatiles and solids 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, 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. Environments of magma formation and compositions are commonly correlated. Environments include subduction zones, continental rift zones, mid-ocean ridges and hot spots. Despite being found in such widespread locales, the bulk of the Earth's crust and mantle is not molten. Rather, most of the Earth takes the form of a rheid, a form of solid that can move or deform under pressure. Magma, as liquid, preferentially forms in high temperature, low pressure environments within several kilometers of the Earth's surface.
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