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| Indian Heaven volcanic field ： ウィキペディア英語版 |
Indian Heaven
Indian Heaven is a polygenetic volcanic field in Washington, United States.〔 It is located midway between Mount St. Helens and Mount Adams, and dates from the Pleistocene and Holocene. The field trends north to south and is dominated by seven small shield volcanoes that may have each erupted only once.〔 Those shields are topped by small spatter and cinder cones. The northernmost peak in the field is Sawtooth Mountain and the southernmost is Red Mountain. The highest point is Lemei Rock at .〔
Its last volcanic activity produced a large cinder cone and a voluminous lava and scoria flows about 8,200 years ago.
About 60 eruptive centers lie on the long, N10°E-trending, Indian Heaven fissure zone. The field has a volume of about and forms the western part of a Quaternary basalt field in the southern Washington Cascades, including the King Mountain fissure zone along which Mount Adams was built.
==Notable Vents==
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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