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A very rare type of achondrite meteorite, named after the 4-kg meteorite that fell at Chassigny, France, in 1815, the only known fall of this type. Chassignite (also known as olivine achondrite) is an olivine-rich rock that resembles lunar and terrestrial dunites in texture and general mineral composition, but contains olivine of higher iron content. The Chassigny meteorite contains 92% olivine. It has a formation age of 1.3 billion years and an exposure age of about 12 million years. Chassignite belongs to the class of SNC meteorites, which are thought to come from Mars.

Subjects: Astronomy and Astrophysics.

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