翻訳と辞書 Words near each other ・ Fern Prairie, Washington ・ Fern Rahmel ・ Fern Ridge ・ Fern Ridge High School ・ Fern Ridge Reservoir ・ Fern Ridge Wildlife Area ・ Fern Ridge, Langley ・ Fern Rivard ・ Fern Rock Transportation Center ・ Fern Rock, Philadelphia ・ Fern School ・ Fern Schumer Chapman ・ Fern Shollenberger ・ Fern Shubert ・ Fern Shumate ・ Fern spike ・ Fern sports ・ Fern Sutherland ・ Fern test ・ Fern Township, Hubbard County, Minnesota ・ Fern Tree ・ Fern Tree, Tasmania ・ Fern Villeneuve ・ Fern Whelan ・ Fern, Buckinghamshire ・ Fern, Pleasants County, West Virginia ・ Fern, Wisconsin ・ Fern-C ・ Ferna ・ Fernacre 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 Fern spike ： ウィキペディア英語版 Fern spike In paleontology, a fern spike is the occurrence of abundant fern spores in the fossil record, usually immediately (in a geological sense) after an extinction event. The spikes are believed to represent a large, temporary increase in the number of ferns relative to other terrestrial plants after the extinction or thinning of the latter, probably because fern dispersal is more rapid over large geographic areas, since single-celled fern spores are more easily distributed by the wind than are seeds. Fern spikes are most associated with the Cretaceous–Paleogene extinction event, although they have been found at other events such as at the Triassic-Jurassic boundary. Away from the fossil record, fern spikes have also been observed to occur in response to local extinction events, for instance the 1980 Mount St. Helens eruption. ==References== 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「Fern spike」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.