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・ Ring Christmas Bells (album)
・ Ring chromosome
・ Ring chromosome 14 syndrome
・ Ring chromosome 20 syndrome
・ Ring circuit
・ Ring class field
・ Ring connection
・ Ring counter
・ Ring Creek
・ Ring culture
・ Ring current
・ Ring Dem Bells
・ Ring der Delphine
・ Ring Deutscher Pfadfinderinnenverbände
・ Ring deutscher Pfadfinderverbände
Ring dike
・ Ring Ding Dong
・ Ring ditch
・ Ring Djursland
・ Ring dove
・ Ring dyeing
・ Ring En Español
・ Ring enhancers
・ Ring expansion and ring contraction
・ Ring finger
・ RING finger domain
・ Ring flash
・ Ring flip
・ Ring for Jeeves
・ Ring forming reaction


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Ring dike : ウィキペディア英語版
Ring dike

A ring dike or ring dyke in geology refers to an intrusive igneous body. Their chemistry, petrology and field appearance precisely match those of dikes or sill, but their concentric or radial geometric distribution around a centre of volcanic activity indicates their subvolcanic origins.
==Notable examples==

*One of the best exposed and studied ring dikes is the Loch Bà ring dike, Isle of Mull, Scotland〔Hall, Anthony, ''Igneous Petrology,'' Longman, 1987 p.75 - 78 ISBN 0-582-30174-2〕
*The ring dikes in the Pawtuckaway State Park and the Ossipee Mountains of New Hampshire
*Pilanesberg within the Pilanesberg Game Reserve in the North West Province of South Africa
*The Ring of Gullion in southern County Armagh, Northern Ireland

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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