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Longman Dictionary of Contemporary English
▪ These can be related to rates of magma production versus differentiation by crystal fractionation within crustal magma chambers.
▪ Its purpose is to gather sufficient information to answer questions about magma chambers in oceanic crust.
▪ We envisage a convecting magma chamber of height H, cooled from above.
▪ The temperature range covers typical values expected in magma chambers.
▪ Instead it slowly froze in a magma chamber into a mush of coarse crystals.
▪ The concepts of crystal settling and convection in magma chambers have a long history r2-6.
▪ The mechanism allows for great variation and complexity in magma chamber sedimentation.
▪ A single deep connection to the magma supply maintains the heat input by convection.
▪ Different minerals in the magma create different structures.
▪ Eruptions can occur through either fissures or vents, again depending on magma type.
▪ Hot magma bubbled up through the older parts of Laurentia west of Hudson Bay, signaling the start of continental rifting.
▪ Igneous intrusions injected as a mobile magma may show sharp contacts with surrounding, or country, rocks.
▪ Pastures of fresh magma flows known as pillow lavas and the rubble of frequent earthquakes line the floor of this stone trough.
▪ Some attributed each crater to a bursting giant bubble of gases escaping from a vast ocean of magma.
▪ The south-southeast-trending increase is most probably the result of a shallow magma intrusion.
The Collaborative International Dictionary

Magma \Mag"ma\, n. [L., fr. Gr. ?, fr. ? to squeeze, knead.]

  1. Any crude mixture of mineral or organic matters in the state of a thin paste.

  2. (Med.)

    1. 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.

    2. A salve or confection of thick consistency.

  3. (Geol.)

    1. The molten matter within the earth, the source of the material of lava flows, dikes of eruptive rocks, etc.

    2. The glassy base of an eruptive rock.

  4. (Chem.) The amorphous or homogenous matrix or ground mass, as distinguished from well-defined crystals; as, the magma of porphyry.

Douglas Harper's Etymology Dictionary

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.


n. 1 (context geology English) The molten matter within the earth, the source of the material of lava flows, dikes of eruptive rocks, etc. 2 (context mathematics English) A basic algebraic structure consisting of a set equipped with a single binary operation.

  1. n. molten rock in the earth's crust

  2. [also: magmata (pl)]


Magma (from Ancient Greek μάγμα (mágma) meaning "thick unguent") 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 and some natural satellites. 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 solidify underground to form an intrusion. Magma is capable of intruding into adjacent rocks (forming igneous dikes and sills), extrusion onto the surface as lava, and explosive ejection as tephra to form pyroclastic rock.

Magma (computer algebra system)

Magma is a computer algebra system designed to solve problems in algebra, number theory, geometry and combinatorics. It is named after the algebraic structure magma. It runs on Unix-like operating systems, as well as Windows.

Magma (algebra)

In abstract algebra, a magma (or groupoid; not to be confused with groupoids in category theory) is a basic kind of algebraic structure. Specifically, a magma consists of a set, M, equipped with a single binary operation, . The binary operation must be closed by definition but no other properties are imposed.

Magma (comics)

Magma (real name Amara Juliana Olivians Aquilla; also known as Alison Crestmere) is a fictional superhero in the Marvel Comics series New Mutants, also associated with various X-Men-related comics. Like all the other New Mutants, Amara originally appeared as a young mutant aspiring to become a hero. Amara, a mutant with the ability to generate lava, joins the New Mutants and becomes Magma.

Magma (disambiguation)

Magma is molten rock found under the Earth's surface.

Magma may also refer to:

Magma (Jonathan Darque)

Magma (Jonathan Darque) is a fictional character, a supervillain from Marvel Comics. He first appeared in Marvel Team-Up vol. 1 #110, as an enemy of Spider-Man and Iron Man.

Magma (Magma album)

__NOTOC__ Magma (reissued under the name Kobaïa) is the debut album by zeuhl artists Magma, which was released as a double- LP in 1970. In the course of this album, the band tells the story of a group of people fleeing a doomed Earth to settle on the fictional planet Kobaïa.

Magma (band)

Magma is a French progressive rock band founded in Paris in 1969 by classically trained drummer Christian Vander, who claimed as his inspiration a "vision of humanity's spiritual and ecological future" that profoundly disturbed him. In the course of their first album, the band tells the story of a group of people fleeing a doomed Earth to settle on the planet Kobaïa. Later, conflict arises when the Kobaïans—descendants of the original colonists—encounter other Earth refugees.

Vander invented a constructed language, Kobaïan, in which most lyrics are sung. In a 1977 interview with Vander and long-time Magma vocalist Klaus Blasquiz, Blasquiz said that Kobaïan is a "phonetic language made by elements of the Slavonic and Germanic languages to be able to express some things musically. The language has of course a content, but not word by word." Vander himself has said that, "When I wrote, the sounds [of Kobaïan] came naturally with it—I didn’t intellectualise the process by saying 'Ok, now I’m going to write some words in a particular language', it was really sounds that were coming at the same time as the music." Later albums tell different stories set in more ancient times; however, the Kobaïan language remains an integral part of the music.

In 1986, the French label Seventh Records was founded in order to (re-)publish Magma's and Vander's work. Over the years, Seventh has also released albums by related artists such as Stella Vander, Patrick Gauthier and Collectif Mu.

Magma (company)

MAGMA Gießereitechnologie GmbH is a developer and supplier of software for casting process simulation. The company was founded in 1988 and has its Headquarters in Aachen, Germany. MAGMA’s product and service portfolio includes simulation software MAGMASOFT, with the newest release MAGMA5, as well as engineering services for casting design and optimisation. The software is used world-wide by foundries, casting buyers and designers, especially for the optimization of cast components in automotive and heavy industry applications. German newspaper Süddeutsche Zeitung cites MAGMA amongst the global market leaders for simulation software for casting processes.

Worldwide, MAGMA employs more than 200 people in software development, support, marketing, and administration, of which 90 are in Aachen. The company also has offices and subsidiaries in the United States, Singapore, Brazil, Korea, Turkey, India, China, and the Czech Republic.

Magma (Gojira album)

Magma is the sixth studio album from French metal band Gojira. The album was released on 17 June 2016 through Roadrunner Records. The album was recorded at the band's studio in New York City, and was produced by Joe Duplantier, mixed by Johann Meyer, and mastered by Ted Jensen. The album sold almost 17,000 copies in its first week of release in the United States, charting at number 24 on the Billboard 200, making Magma the band's highest sales and chart debut to date. The album has been noted as a stylistic departure from the band's previous albums, featuring a more accessible atmospheric sound and more prominent use of clean vocals.

Usage examples of "magma".

It turned out that under the western United States there was a huge cauldron of magma, a colossal volcanic hot spot, which erupted cataclysmically every 600,000 years or so.

They went around the bend, Avelyn stopping the magma river fully, the demon dactyl coming in sight.

The heavy metals and liquid magma of the inner-core electromagnet are the clutch.

Progressively deeper levels within the magma chamber were tapped, until after about seven hours the more mafic grey pumice was reached.

Since no one had ever been able to get magma from the Moho, although both Americans and Russians had tried during the Cold War, Perry decided to go back and drill into the mountain in hopes that Benthic Marine might be the first organization to sample the molten material.

Mara saw one Shocker go EV and slam into a chunk of asteroid when a volcano cannon sheered his S-foils, then watched another vanish in a ball of flame as his starfighter smashed headlong into a magma missile.

Mighty columns of tephra, all the pent-up material that Falcon could fling into the air from its huge maw, seethed and erupted in spasms, hurling ash, magma and boulders high into the sky.

Pages and pages of abstruse geological terms about biotite-pyroxene-hornblendite and the simultaneous existence of ultrabasic and quartzofeldspathic magmas .

Thus, the strength of the rocks capping a cooling and vesiculating magma body is easily exceeded long before the magma is solid.

Braggen, his heavy brows bristled, and his short, scrappy steps reflecting a pique like dammed magma.

This whole sector of moonscape is going to be covered with blown out magma and gasses.

The subject of the differentiation of rock-types in the process of solidification as plutonic or volcanic rocks from a particular magma received much attention from him.

A few microseconds after the singularity the Universe was mostly quagma - a magma of free quarks.

In the first microsecond, space was filled with quagma, a swarming magma of quarks, as if the whole universe was a single huge proton.

Adjacent geographical masses would push in to fill the vacuum, just as the underlying, restless, semifluid magma would push up.