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Tabun-Khara-Obo is an impact crater in the Dornogovi Aimag (province) the south-east of Mongolia. The crater, which is exposed at the surface, is 1.3 km in diameter. The crater's rim rises some 20 to 30 meters above the crater bottom,〔 but the bottom of crater is covered with up to 171 m thick layer of lake deposits - a testimony that this crater in earlier times was filled with a lake.〔(【引用サイトリンク】title=Tabun Khara Obo )〕 It has an estimated age of 150 ± 20 million years (Upper Jurassic). The site was first identified as a probable impact crater in the 1960s,〔 although confirmation of the hypothesis only occurred decades later.〔(【引用サイトリンク】 Tabun Khara Obo, Mongolia )〕 Drilling at the site in 2008 revealed rock features consistent with high-speed impacts such as those caused by meteorites.〔 Image:Tabun-Khara-Obo crater.jpg|Landsat image of the Tabun-Khara-Obo crater; screen capture from NASA World Wind. Image:Tabun-Khara-Obo crater x5.jpg|Oblique Landsat image of Tabun-Khara-Obo crater draped over digital elevation model (x5 vertical exaggeration); screen capture from NASA World Wind. Image:Image-Tabun-Khara-Obo crater from-the-ground.jpg|View to north across the Tabun-Khara-Obo crater. Image:Tabun Khara Obo, Mongolia.jpg|Satellite image of the crater and surrounding area. == References == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tabun-Khara-Obo crater」の詳細全文を読む スポンサード リンク
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