Glacial formations are natural structures created by the movement and melting of glaciers, which are large masses of ice that flow slowly over land. As glaciers advance and retreat, they shape the landscape, carving out valleys and creating features like moraines, drumlins, and glacial lakes. These formations provide important evidence of past climate conditions and the Earth's geological history. One common type of glacial formation is the cirque, a bowl-shaped depression found at the head of a glacier. Another is the fjord, a deep, narrow inlet formed when a glacier retreats and fills with seawater. These formations are crucial for understanding the processes of erosion and sediment deposition in glacial environments.