The characteristics mentioned above are controlled by the development and evolution of the northern Xinjiang Hercyniangeosyncline region of Late Carboniferous age.
上述特点的产生受新疆北部晚石炭世古海西地槽区发展演化的控制。
The pre Bogda mountain depression was formed by directly succeeded to the gradually evolution of late Hercyniangeosyncline, so it is a new type of pre mountaln depression.