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The Red River Gorge is a canyon system on the Red River in east-central Kentucky. Geologically, it is part of the Pottsville Escarpment. Much of the Gorge is located inside the Daniel Boone National Forest and has been subsequently reserved as the Red River Gorge Geological Area, an area of around .〔 It has been designated a National Natural Landmark and National Archaeological District, and it is listed on the National Register of Historic Places.〔(【引用サイトリンク】title=Red River Gorge Geological Area )〕 The Clifty Wilderness Area lies entirely within the geological area in the Red River Gorge. This intricate canyon system features an abundance of high sandstone cliffs, rock shelters, waterfalls, and natural bridges. There are more than 100 natural sandstone arches in the Red River Gorge Geological Area. The multitude of sandstone and cliff-lines have helped this area become one of the world's top rock climbing destinations and is home to the Red River Gorge Climbers' Coalition. The area is nicknamed the Red by climbers.〔Pegg, Dave. (Red River Gorge, Kentucky, USA ), UK Climbing, March 2009.〕 Kentucky's Natural Bridge State Park is immediately adjacent to this area, featuring one of the largest natural bridges in the Red River Gorge. Because of its unusual and rugged nature, the Red River Gorge features a remarkable variety of ecological zones. ==History== 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「Red River Gorge」の詳細全文を読む スポンサード リンク
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