The author presume the original physiognomy of jiuzhai valley , and acknowledged changhai valley was a surface - water with uniform waterpower , the rize valley was a branch of it but the inequality rise of lithosphere , the deposit of earthquake landslides debris flows and falling or glacier blocked the river - way , furthermore , the flow water with high content of ca ( hco3 ) 2 , so tufa dyke formed and evolvement the present dyke of lakes the present physiognomy formed on the base of those 2 由于地震、滑坡、泥石流引起的堆積物和冰川作用形成的冰磧物堵塞河道,再加上構(gòu)造運(yùn)動(dòng)造成地殼的不均勻抬升,九寨溝的這種獨(dú)特的地質(zhì)環(huán)境以及高含ca ( hco _ 3 ) _ 2的巖溶水流作用下,為caco _ 3沉積創(chuàng)造條件,沉積的caco _ 3加高、連接最終形成灰華堤壩,使湖泊的形成成為可能。