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The Hantan River
The occurrence and development of the Hantan River flowing from Mount Jangamsan in Pyeonggang-gun, Gangwon-do are due to the volcanic activity that occurred approximately 270,000 years ago.
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Lava erupted from the volcanic activity of Mount Orisan, located in the Pyonggang region of North Korea; flowed 95 km through Yeoncheon to Paju; and a lava plain was formed over a vast area of land (641 km2 in total).
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Thereafter, as a result of active wind and water erosion along the weak boundary between granite and gneiss, the Hantan River Gorge was formed through the center of the Cheorwon Plain.
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The Hantan River area has a unique landscape of small waterfalls, columnar joints, planticular joints, and ponds, along with wide plains and wetlands.
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It is an area with excellent biodiversity, with numerous living beings nesting in various places due to the diverse habitats it provides.
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The area also serves as a shelter for Grus japonensis, Aegypius monachus, and Anser fabalis, which migrate from Russia and northern China to escape the cold in winter.