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stony-iron meteorite

[stoh-nee-ahy-ern] /ˈstoʊ niˌaɪ ərn/
noun
1.
a meteorite of roughly equal proportions of metallic iron and stony matter.
Also called siderolite.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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stony iron meteorite in Science
stony-iron meteorite
  (stō'nē-ī'ərn)   
A relatively rare type of meteorite consisting of approximately equal amounts by weight of silicate minerals and an alloy of nickel and iron. See more at meteorite.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for stony iron meteorite

any meteorite containing substantial amounts of both rocky material (silicates) and nickel-iron metal. Such meteorites, which are often called stony irons, are an intermediate type between the two more common types, stony meteorites and iron meteorites. In specimens of one common type of stony iron, known as pallasites (formerly called lithosiderites), the nickel-iron is a coherent mass enclosing separated stony parts. The material that makes up pallasites probably formed, after melting and differentiation of their parent asteroids, at the interface between the nickel-iron metal core and the surrounding silicate mantle. The other common type, the mesosiderites (formerly called siderolites), are impact breccias. They are probably related to the basaltic achondrite group of stony meteorites, but they contain an unusually large quantity of interspersed metal. The source of the metal is not known for certain, but it may be from the core of the body that collided with and brecciated the mesosiderite parent body

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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