翻訳と辞書 Words near each other ・ Sidera Lodoicea ・ Sidera Networks ・ Siderado ・ Sideral Air Cargo ・ Sideras ・ Siderasis ・ Siderastrea radians ・ Siderastrea siderea ・ Siderastreidae ・ Sidereal ・ Sidereal and tropical astrology ・ Sidereal time ・ Sidereal year ・ SideReel ・ Sidereus Nuncius ・ Siderian ・ Sideridis ・ Sideridis implexa ・ Sideridis lampra ・ Sideridis peculiaris ・ Sideridis reticulata ・ Sideridis rivularis ・ Sideridis turbida ・ Siderin ・ Sideris Tasiadis ・ Siderite ・ Sideritis ・ Sideritis barbellata ・ Sideritis candicans ・ Sideritis cypria Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Siderian ： ウィキペディア英語版 Siderian The Siderian (; (ギリシア語:sideros), meaning "iron") is the first geologic period in the Paleoproterozoic Era and lasted from Ma to Ma (million years ago, from (ギリシア語:Mega) and (ラテン語:Annum) ). Instead of being based on stratigraphy, these dates are defined chronometrically. Abundance of banded iron formations (BIFs) peaked early this period. BIFs were formed as anaerobic algae produced waste oxygen that combined with iron, forming magnetite (Fe3O4, an iron oxide). This process cleared iron from the oceans, presumably turning greenish seas clear. Eventually, without an oxygen sink in the oceans, the process created the oxygen-rich atmosphere of today. This event is known as the oxygen catastrophe, which according to some geologists triggered the Huronian glaciation.〔Paleoclimates: The First Two Billion Years - James F. Kasting & Shuehi Ono, 2006 http://www.jstor.org/stable/20209693〕〔The Paleoproterozoic Snowball Earth: A climate disaster triggered by the evolution of oxygenic photosynthesis - Kopp et al. http://www.pnas.org/content/102/32/11131.full.pdf+html〕 == References == * (【引用サイトリンク】 work=GeoWhen Database ) * ("The Siderian" ). Dinosaurfact.net. Retrieved May 24, 2015. 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「Siderian」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.