chondrite

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chondrite:

see meteoritemeteorite,
meteor that survives the intense heat of atmospheric friction and reaches the earth's surface. Because of the destructive effects of this friction, only the very largest meteors become meteorites.
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chondrite

(kon -drÿt) A type of stony meteorite that contains chondrules. They are the most abundant class of meteorite in the Solar System (about 86%). Chondrites are largely composed of iron- and magnesium-bearing silicate minerals with a wide range of compositions. Their chemical composition is similar to that of the Sun (but depleted in volatile gases like hydrogen and helium). Several types are recognized: carbonaceous chondrites have the highest proportions of volatile elements and are the most oxidized; enstatite chondrites contain the most refractory elements (withstanding high temperatures) and are reduced; ‘ordinary’ chondrites, the most common type, are intermediate in volatile element abundance and oxidation state. Ordinary chondrites plus some carbonaceous chondrites are thought to be primitive samples of early Solar-System material. See also asteroids. Compare achondrite.

Chondrite

 

the most common type of stony meteorite, accounting for 90 percent of all such meteorites. Chondrites are characterized by the presence of chondrules located in the primary, fine-grained mass of the meteorite (see). They contain a significant amount of nickel-bearing iron in the form of small grains that have the same composition and microstructure as the grains in octahedrites.

chondrite

[′kän‚drīt]
(geology)
A stony meteorite containing chondrules.
References in periodicals archive ?
R chondrites are thought to have formed somewhere between Earth and Jupiter.
05, which implies a broad opposition effect, but they may be icy and have a bright surface component (similar to carbonaceous chondrite meteorites) both of which imply a sharp opposition effect.
Analysis of the meteorites, known as EET92042 and GRA95229, showed that they contained the highest levels of amino acids ever found in a chondrite.
The concentration of each REE is divided by the concentration of that element in chondrite, which is thought to reflect the composition of the early Earth.
Saturation magnetization measurements of carbonaceous chondrites.
Many of the Chondrites traces show vertical compression indicating some compaction of the mud during lithification (Fig.
Among the most useful pieces of debris are the oldest, most primitive and least altered type of meteorites, called the chondrites (KON-drites).
While it is generally assumed that the global bulk composition of Earth and other terrestrial planets is chondritic for refractory elements such as Sm and Nd, it has recently been shown that the 142Nd/144Nd values display a systematic and reproducible bias between all the chondrites and the average composition of the Earth, and also possibly of other planets.
Washington, May 10 ( ANI ): Researchers from Brown and Case Western Reserve universities and Carnegie Institution of Washington have found that the water found on the moon, like that on Earth, came from small meteorites called carbonaceous chondrites in the first 100 million years or so after the solar system formed.
Carbonaceous chondrites, which are thought to have delivered lots of water to the early Earth, make up less than 3 percent of known meteorites.
It's a dump of miscellaneous facts about carbonaceous chondrites, not well-honed arguments edited to promote concision or cogency," he said.
The majority of the remaining fragments are similar to the more common types of meteorites called chondrites.