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Key terms: crater rim impact meteorite ft barringer arizona meteor crater site iron mine tons bulk gilbert natural fragment remains science layers formed believed canyon diablo impact craters discovery caused visitor center ground impactor formation winslow geology museums volcanic interior post office sandstone astronaut north rim excavated vaporized barringer crater geological scientists million years ago meteorite crater daniel barringer national natural rim of the crater kilometers per second meteor crater visitor center Search external links cited by footnotes on Wikipedia page Meteor Crater: |
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