shatter cone

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Noun

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shatter cone (plural shatter cones)

A well-developed shatter cone from the Steinheim impact crater in Germany.
  1. (geology) A type of geologic feature consisting of a branching network of multiple stacked conical or spoon-shaped striated fractures produced by high-intensity shock waves, with the apex of the cones pointing back towards the point of origin of the shock waves; only known to be produced by hypervelocity meteorite impacts or underground nuclear explosions.