Glacial phenomena refer to the various processes and features associated with glaciers, which are large masses of ice that form from compacted snow over time. These glaciers move slowly, shaping the landscape through erosion and deposition. Common features include moraines, which are ridges of debris left behind, and glacial valleys, which are U-shaped valleys formed by the movement of ice. Another important aspect of glacial phenomena is the formation of icebergs, which are large chunks of ice that break off from glaciers and float in the ocean. Additionally, glaciers can influence climate patterns and sea levels, making their study crucial for understanding environmental changes.