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Rupel Formation : ウィキペディア英語版 | Rupel Formation The Rupel Formation (abbreviation: RU) is a geologic formation in the subsurface of the Netherlands that consists of Oligocene marine sands and clays. The Rupel Formation is part of the Middle North Sea Group and correlates exactly with the Belgian Rupel Group. ==Name== The Rupel Formation was first described by André Hubert Dumont in 1849. The formation is taken from Belgian lithostratigraphy, although it is considered a group in Belgium. The age in which the formation formed is the Rupelian (34 to 28 million years ago), a subdivision of the Oligocene epoch. The age and the formation are both named after the Belgian river Rupel.
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「Rupel Formation」の詳細全文を読む
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