What are three landforms created by glaciers that have retreated or disappeared?

Three landforms created by retreating or disappearing glaciers include moraines, which are accumulations of debris left at the glacier's edge; U-shaped valleys, formed by the erosive power of glaciers carving through bedrock; and kettles, which are depressions created when chunks of ice become buried in sediment and later melt. These features illustrate the significant impact glaciers have on shaping the landscape.