Science Fair Project Encyclopedia
As the glaciers expanded, due to their accumulating weight of snow and ice , they crushed and scoured surface rocks and bedrock. The resulting erosional landforms include striations, cirques, and hanging valleys.
Later, when the glaciers retreated leaving behind their freight of crushed rock and sand (glacial drift ), they created characteristic depositional landforms. Examples include glacial moraines, eskers, and kames. Drumlins are another landform left behind by retreating glaciers. The stone walls of New England contain many glacial erratics, rocks that were dragged by a glacier many miles from their bedrock origin.
Glacial lakes and ponds
Lakes and ponds can also be caused by glacial movement. Kettle lakes form when a retreating glacier leaves behind an underground chunk of ice. Moraine-dammed lakes occur when a stream (or snow runoff) is dammed by glacial debris.
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