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stony-iron meteoriteAny of a relatively small group of meteorites containing on average 50% nickel-iron and 50% stony (mainly silicate) material. Stony irons can be subdivided into pallasites, which are composed of abundant grains of olivine (a magnesium silicate mineral) enclosed in metal, and mesosiderites, which are agglomerates of metal and silicates. See also S-type asteroids.
stony-iron meteorite[′stō·nē ¦ī·ərn ′mēd·ē·ə‚rīt]
Any of the rare meteorites containing at least 25% of both nickel-iron and heavy basic silicates. Also known as iron-stony meteorite; lithosiderite; sideraerolite; siderolite; syssiderite.