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Joseph Creek (Oregon) : ウィキペディア英語版 | Joseph Canyon
Joseph Canyon (Nez Perce: an-an-a-soc-um, meaning "long, rough canyon") is a -deep basalt canyon in northern Wallowa County, Oregon, and southern Asotin County, Washington, United States. ==Geography== Joseph Canyon contains Joseph Creek, a tributary of the Grande Ronde River, which flows into the Snake River, a tributary of the Columbia. The geology is typical of the Columbia Plateau, formed by the Columbia River Basalt Group, and the exposed canyon walls provide a striking view of flood basalt flows and dikes. The canyon floor contains sediments deposited by the Missoula Floods.
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「Joseph Canyon」の詳細全文を読む
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