Phone: (0206) - 3854 211
Time to visit a place: 120 phút
Open Time: 7:00 AM -
Close Time: 6:00 PM
Address: Thanh Cong, Nguyen Binh, Cao Bang Xã Thành Công, Huyện Nguyên Bình, Tỉnh Cao Bằng
The Phia Oac area has a complex segmented topography characterized by narrow valleys and high and steep mountains. Many summits are 1000m to nearly 2000m asl, such as Phia Oac (1935m), which is the second highest mountain in Cao Bang.
Geologically, the area is a mixture of limestone, sandstone, shale and granite, which results in karst landscapes mixed with earthy mountains. The diversity of topography, geomorphology and geology together with specific climatic conditions produces characteristic high mountain ecosystems and rich biodiversity of the area.
In the distant past, the area was transformed from an ocean to a continent c.250 million years ago. It witnessed then widespread magmatic activities, with strong but smouldering “flaming mountains” extending deep in the Earth 85-95 million years ago, which caused intensive changes in the surrounding rocks. In the last phases, the gas-rich magma caused even more intensive changes, including the formation of rare and precious minerals. Depending on the composition of the surrounding rocks, different types of minerals were formed, such as tungsten in Ban O and Lung Muoi, tin in Tinh Tuc, and fluorite containing radioactive elements in Binh Duong.
Later mountain building resulted in the Phia Oac Mountain with different ranges of sub climate from the ... View more