- Geology. molten material beneath or within the earth's crust, from which igneous rock is formed.
- any crude mixture of finely divided mineral or organic matter.
- Chemistry, Pharmacology. a paste composed of solid and liquid matter.
Origin of magma
Examples from the Web for magma
Underneath our feet tectonic plates shift, magma bubbles, water boils, and both regularly erupt.Want to Write a Book? Go to Iceland
May 26, 2014
Iron-heavy minerals are believed to have sunk through the magma before floating to the surface in a new form of mountain.Space Bling: From Diamond Planets to Crystal Oceans to Precious Moon Jewels
Alexa Valiente, Jaewon Kang
October 13, 2012
Like magma seeping up through geological faults, this emotion can explode in unexpected ways.Why We Riot: How Fans Turned an Egypt Soccer Match Into a Bloodbath
February 3, 2012
The scientist pointed out the magma on Dr. Williams' sketch.
According to what we have, this is the shape of a magma front.
Notice that the magma is not following the original channels.
Now, two magma areas were showing where only one had shown before.
At any rate, it is somewhat above this discontinuity that magma is formed.
- a paste or suspension consisting of a finely divided solid dispersed in a liquid
- 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
Word Origin and History for magma
mid-15c., "dregs," from Latin magma "dregs of an ointment," from Greek magma "thick unguent, ointment," from root of massein "to knead, mold," from PIE *mag- "to knead" (see macerate). Geological meaning "molten rock" is 1859. Related: Magmalic.
- A mixture of finely divided solids with enough liquid to produce a pasty mass.
- A suspension of particles in a liquid, such as milk of magnesia.
- The molten rock material that originates under the Earth's crust and forms igneous rock when it has cooled. When magma cools and solidifies beneath the Earth's surface, it forms what are known as intrusive rocks. When it reaches the Earth's surface, it flows out as lava and forms extrusive (or volcanic) rocks.