Hi list, After seeing some excellent photos of Park Forest now -- thanks especially to Matt Morgan and Adam Hupe for sharing images of their slices -- I'm struck by how black the shocked part of that meteorite is. You can even see the transition from unshocked to shocked in a boundary zone of breccia. I've also seen this dark shocking in other chondrites. Can someone explain what happens physically or chemically inside a meteorite to turn a light matrix black during the shock (impact) event? Thank you for your help. Bob
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