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Riphean (stage) : ウィキペディア英語版 | Riphean (stage)
The Riphean is a stage or age of the geologic timescale from . The name Riphean is used in the Proterozoic stratigraphy of the Siberian Craton in Russia. It was also used in a number of older international geologic timescales but is in the most recent timescales of the ICS replaced by the Ectasian, Stenian and Tonian periods of the Neo- and Mesoproterozoic eras.〔(GeoWhen Database - Riphean )〕 The word 'Riphean' comes from the ancient Riphean Mountains, sometimes identified with the Ural Mountains. ==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「Riphean (stage)」の詳細全文を読む
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