Glacier Landforms: Moraines

Moraines are accumulations of dirt and rocks that have fallen onto the glacier surface or have been pushed along by the glacier as it moves. The dirt and rocks composing moraines can range in size from powdery silt to large rocks and boulders. A receding glacier can leave behind moraines that are visible long after the glacier retreats.

Moraine diagram
Glaciers can form multiple types of moraines. —Credit: University of Notre Dame
Photograph of a moraine
This ground-view of a moraine shows the immense amount of rock and debris that a glacier plows in front of it or pushes off to the side. —Credit: Tim Bocek