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The formation of Pearl Spring is the result of geological structure, groundwater movement, mineral deposition, surface vegetation, climatic factors and human activities. Complex geological structure, groundwater and rock reaction dissolved minerals, vegetation and climatic conditions are conducive to groundwater circulation, Human activities should be carried out reasonably to protect the spring ecological environment....

Black Sandbar is located in the southeast coast of China. It is named because the sandy soil is rich in iron oxide. Its history can be traced back to the Southern Song Dynasty, was an important fishing ground and exchange node for fishermen, and now has become a popular tourist destination. Geologists believe that the black sand formed by volcanic ash and rock weathering, local people make a living by fishing, traditional customs and the sea....