翻訳と辞書 |
Garbh Eilean : ウィキペディア英語版 | Garbh Eilean
Garbh Eilean (Scottish Gaelic ''Rough Isle'') is one of the Shiant Isles at the south end of the Minch on the west coast of Scotland. ==Geology== In geological terms, these islands essentially represent an extension of the Trotternish peninsula of Skye. The rocks are volcanic, and at 60Ma, very young by Hebridean standards. Dolerite columns on the north side of Garbh Eilean are over 100m tall and about 2m across. Similar to those at Staffa and the Giant's Causeway, they were formed by the slow cooling of volcanic rocks deep underground.〔(【引用サイトリンク】 title=Western Isles Guide Book: Shiant Islands )〕 Intrusion sills show a progression in their chemical compositions, from olivine-rich rocks at the base to rocks with very little or no olivine at the top. The sills are thought to have formed by crystal settling. Recent study has suggested that at least one of the sills represents a multiple intrusion. In some places the basalt is overlain by Jurassic mudstone, which weathers to form much more fertile soil than elsewhere in the Western Isles.
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「Garbh Eilean」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.
|
|