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Hat Rock State Park : ウィキペディア英語版 | Hat Rock State Park
Hat Rock State Park is a state park in the U.S. state of Oregon, administered by the Oregon Parks and Recreation Department. The park is located off the east side of U.S. Highway 730 in Hermiston, on the south shore of Lake Wallula behind McNary Dam on the Columbia River.〔(【引用サイトリンク】publisher=U.S. Army Corps of Engineers )〕 ==Flood basalt==
Hat Rock is a geological formation that, along with another outcropping rock in the park called Boat Rock, are thought to be exposed remnants of a 12-million-year-old basalt flow. Floods from the Ice Age eventually left these bedrocks, as well as others along the Columbia River Gorge exposed at the surface of the Earth. It is 70 feet (21 meters) high.
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「Hat Rock State Park」の詳細全文を読む
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