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impact structure

noun
1.
a large geologic formation, as a crater, created by a comet's or meteor's collision with a planet.
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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Historical Examples
  • An impressive example of an impact structure is Meteor Crater, Ariz., which is visited by thousands of tourists each year.

    Volcanoes Robert I. Tilling

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