Landforms
Xu Xiake is also a pioneer in the world's scientific investigation of limestone landforms. Xu Xiake made a detailed investigation in Hunan, Guangxi, Guizhou and Yunnan, and made a detailed description, record and study of different limestone landforms in various places. He also inspected more than a hundred limestone caves. He didn't have any instruments, it was all about visual footwork, but most of his expeditions were very scientific. For example, the record of the fifteen cave openings of the Seven Star Rock in Guilin is generally consistent with the field surveys of today's geographical researchers. More than a hundred years after Xu Xiake's death, Europeans
began to investigate limestone landforms, and Xu Xiake can be called the world's earliest limestone landform scholar. He pointed out that the cave is caused by the erosion of flowing water, and the stone stalactite is caused by the limestone dissolved in water, and after the water dripping from the limestone evaporates, the limestone condenses into stalactites, showing various wonderful shapes. Most of these insights are in line with the principles of modern science and till now it still
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