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The major impacts that form large craters are rare events, occurring on Earth roughly every 100 million years. The last major impact was 65 million years ago (mya). Over such a long period of time, the forces of erosion, deposition, and plate tectonics can destroy or bury a crater. The remnants of the 65 mya impact crater, for example, are buried under more than a kilometer of sedimentary rock. Large impacts were more common when the solar system was young and many of the large craters on the moon date to that time, but almost none of Earth's crust from that time still exists.

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Q: Why don't we find large craters on earth?
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Related questions

Why do you see seven impact craters on the moon but few on earth?

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