英语词汇“astrobleme”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

　

单词	astrobleme
释义	astrobleme enUK as·tro·bleme A5508300 (ăs′trə-blēm′)n. A scar on the earth's surface left from the impact of a meteorite. [astro- + Greek blēma, missile, wound (from ballein, to throw; see g^welə- in Indo-European roots).] astrobleme (ˈæstrəˌbliːm) n (Geological Science) a mark on the earth's surface, usually circular, formed by a large ancient meteorite impact[C20: from astro- + Greek blēma shot, wound] astrobleme - A crater caused by a meteor.See also related terms for meteor. astrobleme A mark left on the surface of the Earth by the impact of a meteorite. Translations astrobleme enUK astrobleme (ăs`trōblēm'), large, circular structure ranging from c. 1-2 mi to 40 mi (.8–64 km) in diameter. Astroblemes are found at numerous places on the earth's surface, e.g., Meteor, or Barringer, Crater in Arizona, Brent Crater in Ontario, and Vredefort Ring in South Africa. The presence of meteor fragments, strange conical fracture patterns (called shatter cones), and coesite (a superdense, high-pressure form of quartz) in the rocks at astroblemes suggest an impact, rather than volcanic, origin to these circular structures. astrobleme [′as·trō‚blēm] (geology) A circular-shaped depression on the earth's surface produced by the impact of a cosmic body.
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更新时间：2024/12/23 1:41:39