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Botryoidal Spring is a geyser in the Lower Geyser Basin of Yellowstone National Park in the United States. Botryoidal Spring is part of the White Creek Group which includes A-0 Geyser and Spindle Geyser. As its name indicates, Botryoidal Spring was originally a hot spring (and botryoidal means 'bubbly'). In 1996, seismic activity caused to change from a sparkling spring into an explosive geyser. It erupts for a duration of about one minute with an interval of around 3–5 minutes between eruptions. The fountain reaches a height of 10 feet (3 m).〔(【引用サイトリンク】publisher=Geyser Observation and Study Association (GOSA) )〕 Immediately after an eruption the pool is totally quiet. An eruption starts with no warning, most beginning with a blue bubble caused by immense steam bubbles forming below. ==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「Botryoidal Spring」の詳細全文を読む スポンサード リンク
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