Moraines only show up in places that have, or used to have, glaciers. Glaciers are extremely large, moving rivers of ice. Glaciers shape the landscape in a process called glaciation.
How are moraines related to glaciers?
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.
What do moraines commonly form?
Dump moraines form where debris flows or falls from a glacier surface due to gravity and accumulates at the ice front or side as a ridge. They form where the ice front is stationary and there is a regular supply of debris to the snout, normally due to the melt-out of rock debris stored in the ice4.
