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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 Bayan Shireh Formation ： ウィキペディア英語版 Bayan Shireh Formation The Bayan Shireh Formation (also known as Bayanshiree Svita or the Baynshirenskaya Formation) is a geological formation in Burkhant, Mongolia, that dates to the late Cretaceous period. The exact age is uncertain, with two competing hypotheses; based on comparisons with other formations, the Bayan Shireh fauna seems to correspond best with the Turonian through early Campanian stages of the Late Cretaceous, about 93 to 80 million years ago.〔Jerzykiewicz, T. and Russell, D.A. (1991). "Late Mesozoic stratigraphy and vertebrates of the Gobi Basin." ''Cretaceous Research'', 12(4): 345-377.〕 However, examination of the magnetostratigraphy of the formation seems to confirm that the entire Bayan Shireh lies within the Cretaceous Long Normal, which lasted only until the end of the Santonian stage, giving a possible Cenomanian through Santonian age, or between 98 and 83 million years ago.〔Hicks, J.F., Brinkman, D.L., Nichols, D.J., and Watabe, M. (1999). "Paleomagnetic and palynological analyses of Albian to Santonian strata at Bayn Shireh, Burkhant, and Khuren Dukh, eastern Gobi Desert, Mongolia." ''Cretaceous Research'', 20(6): 829-850.〕 The fauna of this formation is similar to the nearby Iren Dabasu Formation. ==Fauna== 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「Bayan Shireh Formation」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.