The Chassigny meteorite

In 1815, a stone was observed to fall from the sky after loud sonic booms were heard. Although it was estimated that the meteorite originally weighed about 4,000 grams (~9 pounds), there is only about 570 grams preserved of the meteorite today. Chassigny is distinctly different from the other SNC’s (the Shergotty-Nakhla-Chassigny  Clan) , so it has been assigned its own signature subgroup, chassignite, to distinguish it from the shergottites and nakhilites.

Chassigny was the first Martian meteorite to be discovered and is now regarded as the prototype for three martian ‘chassignites.’ The chassignites are only a small subset of the nearly 150 martian meteorites identified by 2015. Some shock features and melt inclusions appear to be derived from (at least one) impact events. Curiously enough, however, while the chassignites appear to have been derived from deep beneath the Martian crust, they are generally not as shocked as some of the Martian shergottites produced nearer to the Martian surface.

https://www.mindat.org/loc-29684.html

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