Nanling Mountains
The Nanling (Chinese: 南岭; pinyin: Nánlǐng; literally: "Southern Mountains"), also known as the Wuling (Chinese: 五岭; pinyin: Wǔlǐng; literally: "Five Mountains"), is a mountain range separating the Pearl River Basin from the Yangtze Valley and the dividing line between south and central subtropical zones, the mountains are a major mountain range in South China. The main range of Nanling Mountains stretch west to east about 600 kilometres (370 mi) from Guilin and Hezhou of the eastern Guangxi to Ganzhou of the southern Jiangxi, north to south about 200 kilometres (120 mi) from Yongzhou and Chenzhou of the southern Hunan to Qingyuan and Shaoguan of the northern Guangdong; With its branches, the whole mountains run west to east 1,400 kilometres (870 mi).
There are trough basins in the Nanling, the most of the western basins in Nanling Mountains are composed of limestone, where karst regions are located. the most of the eastern basins are made up of red sandstone, where are danxia landform areas. The Nanling are boundaries between the four provinces of Guangdong, Guangxi, Hunan and Jiangxi, and also the cultural boundaries, on the south of the mountains are Lingnan culture area.
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