magma (măg`mə): see lava lava (lä`və), molten rock that erupts on the earth's surface, either on land or under the ocean, by a volcano or through a fissure.
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magma

Molten or partially molten rock from which igneous rocks form, usually consisting of silicate liquid. Magma migrates either at depth or to the Earth's surface, where it is ejected as lava. The interactions of several physical properties, including chemical composition, viscosity, content of dissolved gases, and temperature, determine the characteristics of magma. Numerous events that can occur during crystallization influence the resulting rock: separation of early crystals from liquid prevents reaction between them; magma can cool too rapidly for reaction to occur; and loss of volatiles may remove some components from the magma.

magma

1. a paste or suspension consisting of a finely divided solid dispersed in a liquid

2. hot molten rock, usually formed in the earth's upper mantle, some of which finds its way into the crust and onto the earth's surface, where it solidifies to form igneous rock

magma [′mag·mə]

(geology)

The molten rock material from which igneous rocks are formed.

(symbolic mathematics, tool)

Magma - A program used for heavy duty algebraic computation in many branches of mathematics. Magma, developed by John Cannon and associates at the University of Sydney, succeeded Cayley. It runs at several hundred sites.

E-mail: <magma@maths.usyd.edu.au>.

http://maths.usyd.edu.au:8000/u/magma/.

[W. Bosma, J. Cannon and C. Playoust, The Magma algebra system I: The user language, J. Symb. Comp., 24, 3/4, 1997, 235-265].

magma (redirected from magmata)

magma

magma
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