How do glaciers shape the landscape of the Tien Shan?

Glaciers have played a significant role in shaping the rugged landscape of the Tien Shan. Their primary geological impact is through the creation of distinct landforms resulting from both erosion and deposition.1

In the mountainous regions, glaciers have produced moraines, which are accumulations of boulder-rich sediments. Through the process of glacial erosion, these ice masses carve out deep, amphitheatre-shaped hollows known as cirques and transform narrow, V-shaped stream valleys into characteristic U-shaped valleys with steep sidewalls. As glaciers erode the landscape, they also sharpen the divides between valleys into jagged ridges called arêtes and can carve mountain flanks into pointed horns.12

While these erosional processes occur in the mountains, the glaciers also contribute to valley formation by depositing gravel and loess in the lower-lying areas. Today, these glaciers remain vital to the region's hydrology, feeding many large rivers such as the Naryn and the Ili.1