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Roter Kamm crater
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Roter Kamm crater : ウィキペディア英語版
Roter Kamm crater

Roter Kamm ((ドイツ語:Red Ridge)) is a meteorite crater, located within the Namibian section of the Namib Desert approximately north of Oranjemund in the ǁKaras Region. It is 2.5 km in diameter and is deep. The age is estimated to be between 4 and 5 million years placing it in the Pliocene.〔Lutz Hecht, Wolf Uwe Reimold, Sarah Sherlock, Roald Tagle, Christian Koeberl, Ralf-Thomas Schmitt. New impact-melt rock from the Roter Kamm impact structure, Namibia: Further constraints on impact age, melt rock chemistry, and projectile composition. Meteoritics & Planetary Science. Volume 43, Issue 7, pages 1201–1218, July 2008.〕 The crater is exposed at the surface, but its original floor is covered by sand deposits at least thick.
The meteorite hit a layer of precambrian granitic gneiss that is part of the Namaqua Metamorphic Complex, overlaid with some younger sedimentary rocks. No parts of the meteorite have been found, suggesting that it completely evaporated upon impact.〔(【引用サイトリンク】title=Roter Kamm crater )〕 The meteor that hit it was approximately the size of an SUV.
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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