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Willis Mountain : ウィキペディア英語版 | Willis Mountain
Willis Mountain is a monadnock rising from the rolling Piedmont hills of Buckingham County, Virginia, near the geographic center of the state. It is composed of Kyanite-bearing quartz that weathers more slowly than the surrounding material. The Kyanite Mining Corporation of Dillwyn has mined Willis Mountain long enough to reduce significantly the profile of the mountain.〔 ==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「Willis Mountain」の詳細全文を読む
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