单词	astrobleme
释义	astrobleme /ˈastrəʊbliːm / noun Geology An eroded remnant of a large crater made by the impact of a meteorite or comet.Large craters, called astroblemes, are frequently hidden by the earth's own natural processes.... Although relatively young meteorite impact craters have been identified in Argentina and Chile, these two Brazilian structures are the first ancient astroblemes to be reported from South America. Dating back 2.023 million years, the Dome is the oldest astrobleme still visible on earth and site of the world's greatest known single energy release. Origin 1960s: from Greek astron 'star' + blēma 'wound'.
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