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Mount Washington (Oregon) : ウィキペディア英語版 | Mount Washington (Oregon)
Mount Washington is a deeply eroded shield volcano in the Cascade Range of Oregon. The mountain dates to the Late Pleistocene. However, it does have a line of basaltic andesite spatter cones on its northeast flank which are approximately 1,330 years old according to carbon dating. The main peak is a volcanic plug that was heavily eroded by glaciers in the last ice age.〔 〕 == See also ==
* Mount Washington Wilderness * Willamette National Forest
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