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・ Lavanam
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・ Lavanda, Crimea
・ Lavandeira
・ Lavandeira, Tocantins
・ Lavandevil
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Lava spine
・ Lava stringer
・ Lava Tongue Pass
・ Lava Tree State Monument
・ Lava tube
・ Lava, California
・ Lava, West Bengal
・ Lava-lava
・ Lava-Ströme
・ Lava-Tudo River
・ Lavaa
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Lava spine : ウィキペディア英語版
Lava spine

A lava spine is a vertically growing monolith of viscous lava that is slowly forced from a volcanic vent, such as those growing on a lava dome (Bates & Jackson, 1987). It may also be considered a kind of dome called a spiny dome (Fink & Anderson, 2000). In February 1983, the dome activity of Mount St. Helens culminated in a spine that reached a height of about 100 ft before collapsing after two weeks, but another lava spine called the Whaleback never collapsed. A diatreme may also be referred to as a lava spine, such as the example of Mount Pelee in 1902.


〔(【引用サイトリンク】url=http://mountsthelens.com/history-3.html )
==See also==

* Lava dome

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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