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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 Unalaska Formation ： ウィキペディア英語版 Unalaska Formation The Unalaska Formation is a Miocene Era geologic formation on Amaknak Island and Unalaska Island, in the Aleutian Islands archipelago of southwestern Alaska. 〔(USGS: Stratigraphy and depositional environment of the Dutch Harbor Member of the Unalaska Formation, Unalaska Island, Alaska )〕 It consists mainly of volcanic breccia, flows, tuff, and intercalated sedimentary rocks. 〔 It is exposed over about 70 percent of Unalaska Island. The Dutch Harbor Member is a thick Early Miocene sequence of the formation.〔 It preserves fossils dating back to the Miocene era of the Neogene period. 〔(【引用サイトリンク】author= Various Contributors to the Paleobiology Database )〕 ==See also== * List of fossiliferous stratigraphic units in Alaska * Paleontology in Alaska 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「Unalaska 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.