翻訳と辞書 Words near each other ・ Ontonagon ・ Ontonagon Boulder ・ Ontonagon County Courthouse ・ Ontonagon County, Michigan ・ Ontonagon Harbor Piers Historic District ・ Ontonagon Indian Reservation ・ Ontonagon Light ・ Ontonagon River ・ Ontonagon School ・ Ontonagon Township, Michigan ・ Ontonagon, Michigan ・ Ontong ・ Ontong Java Atoll ・ Ontong Java flying fox ・ Ontong Java language ・ Ontong Java Plateau ・ Ontonychophora ・ Ontopic ・ Ontoprise GmbH ・ Ontopsychology ・ Ontotext ・ Ontotheology ・ OntoUML ・ OntoWiki ・ OnTrac ・ OnTrack ・ Ontrack (disambiguation) ・ Ontraport ・ Ontronik Khachaturian ・ Ontrouw 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 Ontong Java Plateau ： ウィキペディア英語版 Ontong Java Plateau The Ontong Java Plateau is a huge oceanic plateau located in the Pacific Ocean, lying north of the Solomon Islands. The plateau covers an area of approximately , or roughly the size of Alaska, and reaches a thickness of up to . The plateau is of volcanic origin, composed mostly of flood basalts. Although they are now separated by thousands of kilometres, Manihiki Plateau and Hikurangi Plateau were at the time of their origin part of the same large igneous province, forming the world's largest oceanic plateau. It extruded some 100 million km3 of magma, covering approximately 1% of the Earth's surface, in one of the largest volcanic events on Earth in the last 300 million years.〔"the Manihiki and Hikurangi Plateaus () we interpret as remnants of a formerly contiguous Ontong Java–Manihiki–Hikurangi large igneous province". 〕〔 (Summary ).〕 The Ontong Java Plateau was formed 125–120 million years ago possibly by the initial plume-head phase of a mantle plume center called the Louisville hotspot.〔Antretter, M.; Riisager, P.; Hall, S.; Zhao, X.; and Steinberger, B. (2004). (Modelled palaeolatitudes for the Louisville hot spot and the Ontong Java Plateau ), in ''Origin and Evolution of the Ontong Java Plateau'' Geological Society, London, Special Publications, v. 229, p. 21-30. .〕 The timing corresponds roughly to the early Aptian anoxic event in the oceans. Most of the rocks that make up the plateaus have been dated to 125–119 million years ago, in the Lower Cretaceous Epoch, with some secondary volcanism occurring 20–40 million years later, in the Upper Cretaceous Epoch. These plateaus were formed beneath the waters of the Pacific Ocean, and mostly still lie under the sea—although the collision of the Solomon Islands with the Ontong Java Plateau has lifted some of this plateau above sea level on the islands of Makira, Malaita and the northern half of Santa Isabel—along with the smaller islands of Ramos and Ulawa. Several large seamounts arise from the plateau, including the one capped by Ontong Java Atoll. ==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「Ontong Java Plateau」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.