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Cobb hotspot : ウィキペディア英語版 | Cobb hotspot
The Cobb hotspot is a volcanic hotspot located off the Oregon/Washington coast of the United States. The hotspot is at the Juan de Fuca Ridge, and has made the Cobb-Eickelberg Seamount chain. The Axial Seamount is the hotspot's most recent eruptive center, which last erupted in 1998.〔 〕 The central ridge is thicker than the surrounding crust by one to two km and may be accumulated buildup from the hotspot, which is essentially an underwater volcano with a root twenty to forty kilometers in diameter reaching a depth of beneath the volcano. The magma flows at rate of 0.3 to 0.8 m³/s. The caldera is below sea level.〔 〕〔http://kiska.giseis.alaska.edu/input/west/presentations/agu2001_presentation.pdf〕 ==See also==
*Geology of the Pacific Northwest *Cobb Seamount *Axial Seamount
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「Cobb hotspot」の詳細全文を読む
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