Karst topography

Seen from space, China’s southeastern coast is lush and green, with numerous lakes dotting the landscape. These lakes are known as karst lakes, formed in areas where the underlying bedrock is made up of soluble rocks such as limestone or dolomite. Over millions of years, water seeping through cracks and fissures in the rocks gradually dissolves the soluble minerals, creating underground cavities and tunnels. Eventually, the roof of these cavities may collapse, leading to the formation of sinkholes. In some cases, the collapse is only partial, resulting in depressions in the land surface that fill with water, forming karst lakes. The water in these lakes is often crystal clear and supports a diverse ecosystem. Some of the most famous karst lakes in China include Qiandao Lake and Xingyun Lake

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