The Oneonta Gorge is in the Columbia River Gorge in the American state of Oregon. The U.S. Forest Service has designated it as a botanical area because of the unique aquatic and woodland plants that grow there. Exposed walls of 25 million year old (Miocene epoch) basalt are home to a wide variety of ferns, mosses, hepatics and lichens, many of which grow only in the Columbia River Gorge.[5] Oneonta Gorge has been described as "one of the true dramatic chasms in the state."[5]
Source:Wikipedia
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