Closeup view of stratified layer within drumlin at Galway. Typical drumlin in east-central Wisconsin. This overview shows asymmetrical longitudinal profile of drumlin form. Ice movement is left to right. Ice movement is left to right.
Drumlins are examples of streamlined glacial landforms.
These streamlined forms are created by a combination of glacial erosion, deposition, and squeezing of sediment beneath the ice, and streamlining represents ice movement patterns. Streamlined landscapes may cover vast regions, such as large portions of the Canadian Shield and northern Great Plains. Related sites Drumlins in North Dakota, from the North Dakota Geological Survey. Buried glaciers and dead-ice moraine , from the North Dakota Geological Survey. Erratic boulders in Iowa, from the Iowa Geological Survey.