The geological structure of the Inner Mongolia is complicated. But the most significant land form located on the northeastern part of Inner Mongolia is Greater Hinggan Mountains. What attract people there, are hundreds of lakes on the top of mountains.
As you can see, most of these lakes are crater lakes. The elevation is about 1200-1400 meters. The formation of these lakes was because of the volcano’s eruption. After the eruption of volcanos, craters were taking shaped. And then, after thousands of years’ precipitation, finally crater lakes were formed. Besides, because of the volcanos, there are lots of tephra, and cinder surrounding craters. So, it makes the soil pretty fertile, and it’s very important for the bio-diversity.
Fortunately, those volcanos in Greater Hinggan Mountains no longer erupt. They’re all extinct volcanos today. So, it becomes a very welcomed recreation area in China today. People could go hiking, sightseeing in summer time and skiing in winter.
At the bottom of the Greater Hinggan Mountains, you can find another kind of landform, which is fault. The formation of these faults mainly was because of volcano activities; and water loss and soil erosion for a minimal reason (The first picture is showing the water loss and soil erosion, and the second picture is showing volcano activities).
Since the volcano activities are no longer exist, so there won’t be any faulting. But, the water loss and soil erosion is a really serious problem for the environment. In my opinion, overgrazing is the chief criminal. If people don’t take any method, the reclaiming problem will be more and more serious. It may finally turn the grassland to desert.
