The soil layer of Rouli is 700 to 800 meters deep. Experts have verified it is the thickest soil layer on earth.

 
  • 若笠的黃土層厚達七、八百米,經(jīng)過(guò)專(zhuān)家證實(shí),是整個(gè)地球黃土層最厚的地方。
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