What physical feature found on freshly fallen meteorites is a thin, dark, melted outer layer resulting from ablation during atmospheric passage?

Answer

Fusion crust

A fusion crust is a common feature on a meteorite, appearing as a thin, dark, melted exterior layer formed by intense heat while it passed through the atmosphere as a meteor.

What physical feature found on freshly fallen meteorites is a thin, dark, melted outer layer resulting from ablation during atmospheric passage?
SpaceastronomyasteroidAsteroidsMeteoroidsmeteoroidfragments