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Key terms: tektites lunar impact origin crater moon theory glass rocks sample ray keefe material meteorite terrestrial isotopic nasa volcanic australasian apollo researchers explain sediments scientist formation million years ejecta acidic lunar origin molten antarctica ivory coast futrell chapman determined impact theory tektite glass boundary povenmire lunar sample terrestrial origin lunar rocks composition cosmic rays origin of tektites north american czech republic meteorite impact extraterrestrial material chesapeake bay impact crater Search external links cited by footnotes on Wikipedia page Tektite: |
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