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  Dong Van Karst Plateau Geopark Dong Van Karst Plateau Geopark , (or Dong Van Rock Plateau) spreads over four districts of Quan Ba, Yen Minh, Dong Van and Meo Vac in Ha Giang province of Vietnam. On October 3th 2010, Dong Van Karst Plateau Geopark was officially recognized by UNESCO's Global Geopark Network (GGN) Advisory Council as Global Geopark. At the time, this was the only Global Geopark in Vietnam and the second in Southeast Asia. The Dong Van Rock Plateau is located in the northernmost mountainous region of Vietnam, with an area of 2356.8 km² and an average elevation of about 1,400 - 1,600 m. The plateau has many limestone mountains close to the Tropic of Cancer, with relatively large slopes. The valleys, rivers and streams are very much divided. Many fossils of the species were found 400 - 600 million years old. Dong Van Plateau is a rocky area of different ages from the Devonian to Permian period, surrounded by earth mountains. It rains from