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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Nubian Sandstone ： ウィキペディア英語版 Nubian Sandstone Nubian Sandstone refers to a variety of sedimentary rocks deposited on the Precambrian Basement in the eastern Sahara, north-east Africa and Arabia. It consist of continental sandstones with thin beds of marine limestones, and marls. Nubian sandstone was deposited between the Lower Paleozoic and Upper Cretaceous, with marine beds dating from the Carboniferous to Lower Cretaceous.〔Issawi 1973, p.1433〕 ==Formation== Nubian sandstone ranges in age from the Cambrian to Upper Cretaceous eras. Positioning of the paleoequator and paleolatitude at 20° S was derived from paleomagnetic data showing Nubian sandstone was originally deposited in the paleoequatorial to subequatorial zone. These paleomagnetic results corroborated previous studies suggesting there was no polar wandering and continental drift in Africa during 210 to 110 million years and extended this period to 85 million years. Nubian sandstone is deposited under a tropical to subtropical climate and is formed under a variety of continental conditions, excluding eolian merging intermittently into shallow marine.〔El-Shazly 1982〕 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「Nubian Sandstone」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.