After rapid overall swelling , in the late stage occurred alluvial fan-braided river facies sedimentary cycles made of red polyterrigenous molasse deposit s with multi-source supplying.
In 2011, over 22,000 tons of legacy sediment were removed from the banks of Big Spring Run, transforming the steep, meandering river to a braided, gently-sloping system.
2011 年，Big Spring Run 河岸清除了超过 22,000 吨遗留沉积物，将陡峭蜿蜒的河流转变为缓缓倾斜的辫河道。
Judging by the geology, experts already knew that, about 70 million years ago, the Nemegt Formation was a seasonal floodplain, covered by a network of lakes and braided rivers.
速台升，形成冲积扇～辫状河流相的
拉石红色复陆屑沉积旋回及多物
格局。
：
学
河
节性的洪泛区，被湖泊和
