fusion crust

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Here are two photos of the largest fragment of the Chelyabinsk (LL5) meteorite recovered from Lake Chebarkul in central Russia, 8 months after it crashed through the ice on the lake
. The fusion crust is still visible. The surface texture is more "lumpy" than for most meteorites because the meteorite was fragmenting throughout most of its passage through the atmosphere.

This meteorite, one of several stones of the Seminole (H4) chondrite, was found in a cotton field in west Texas. The fusion crust is weathered and has flaked off in a few places. Weathered fusion crusts are typically reddish. The interior of the meteorite is largely unweathered, however.

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Prepared by:

Randy L. Korotev

Department of Earth and Planetary Sciences
Washington University in St. Louis

Please don't contact me about the meteorite you think you’ve found until you read this and this.