...This is a bowl-shaped depression about 1,200 m in diameter and 190 m deep. Although it is not clear, the topography on Earth that is thought to be the result of a meteorite crater (such as a fossil crater) is called an astroblem (Figure 3). According to statistical studies, meteorites capable of creating a crater with a diameter of 1 km strike the Earth once every 1,400 years. *Some of the terminology that mentions "astroblem" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…これは直径約1200m,深さ190mのおわん型のくぼみである。このように明瞭ではないが,地球上の地形で隕石孔によるものと考えられる地形(クレーターの化石といったもの)は,アストロブレムastroblem(星のつけた傷跡の意)と呼ばれる(図3)。統計的研究によれば直径1kmをこすようなクレーターをつくる能力のある隕石は,1400年に1個の頻度で地球に入射するといわれている。… ※「astroblem」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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