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Leadhills Supergroup : ウィキペディア英語版 | Leadhills Supergroup The Leadhills Supergroup, formerly the Leadhills Group is a geological formation in Scotland. The Supergroup is named after the village of Leadhills. Paeloeflow direction obtained from the horizons of the Corsewell Pont Conglomerate and the Glenn App Conglomerate indicates derivation from the north-west, presumed to be the Midland Valley arc. Dates of detrital muscovite and garnet are ''c.'' 480-460 Ma, indicating an origin from metamorphic activity during the exhumation of the Dalradian Supergroup after the Grampian Orogeny ==Composition== Greywackes, shales, siltstones and mudstones with conglomerates.
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「Leadhills Supergroup」の詳細全文を読む
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