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Home Other GeoPicture

GeoPicture of the Week: Polished Pallasite

Mihai Andrei by Mihai Andrei
October 19, 2015
in GeoPicture
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Image via Imgur.

This is a polished marble of a pallasite – a type of stony-iron meteorite, consisting mostly of centimeter-sized olivine crystals. Olivine is a silicate mineral often found in the Earth’s mantle.

Pallasites were once thought to originate at the core-mantle boundary of differentiated asteroids that were subsequently shattered through impacts, but that theory has been replaced recently by another one, which claims that they are impact-generated mixtures of core and mantle materials

Mihai Andrei

Mihai Andrei

Andrei's background is in geophysics, and he's been fascinated by it ever since he was a child. Feeling that there is a gap between scientists and the general audience, he started ZME Science -- and the results are what you see today.

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