距今200多万年前,地处岷山主峰的黄龙沟在冰川作用下形成冰川U型谷。冰川退却后,黄龙沟冰川底碛上松柳丛生。沟谷上游富含碳酸氢钙的地下水出露,呈片状水流流向整个沟床,流经凸凹不平的河床,在温度、压力、水动力、生物等因素变化的影响下,水中的碳酸钙不断沉积下来,经过漫长的地质作用形成钙化滩流。 More than 2 million years ago, Huanglonggou, located in the main peak of Minshan, formed a glacier U-shaped valley under the action of glaciers. After the retreat of the glacier, Huanglonggou glacier bottom moraine pine willows Cong. Gully in the valley upstream of the exposed groundwater containing calcium bicarbonate, a sheet of water flow to the entire ditch bed, flowing through the rugged river bed, in the temperature, pressure, hydrodynamic, biological and other factors, the continuous deposition of calcium carbonate Down, after a long geological formation of calcification beach.