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Fumarole Butte : ウィキペディア英語版 | Fumarole Butte
Fumarole Butte is a shield volcano in Juab County, Utah. Built during the Quaternary period, it is composed of basaltic andesite. It stands in height and has a diameter of . Under the volcano lies Crater Bench, the result of an eruption of basaltic andesite. To the east of the volcano are a series of hot springs, known as Crater, Baker, or Abraham hot springs. == Background == The area where Fumarole Butte is located was once dominated by Lake Bonneville, a massive body of water that took up nearly . The lake was first created more than 800,000 years ago by extensive precipitation from glaciers, and has dried up and re-emerged at least 28 times since. The cycles have been matched almost exactly to periods of glaciation by drilling and stratigraphy.
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「Fumarole Butte」の詳細全文を読む
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