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achondrite
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achondrite

Stony meteoroid representing differentiated planetary material. Because differentiation is an igneous process, these are igneous rocks or breccias (broken fragments) of igneous rocks. About 15% of all meteorites are achondrites; they lack the chondrules (silicate spherules) found in chondrites.



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? Mentioned in ? References in periodicals archive
 
Known as basaltic achondrites, the group accounts for only 6 percent of terrestrial meteorites.
Deep encounter reveals asteroid's ancestry by Cowen, R. / Science News
Spectra of this rock, the third largest asteroid, have revealed that it is the only known parent of a class of meteorites called basaltic achondrites.
Big asteroid has big dent by Cowen, Ron / Science News
Basaltic achondrites lack the rounded particles, or chondrules, found inside most stony meteorites.
Solar system scenes: images and spectra offer new views from Venus to ... by Cowen, Ron / Science News
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