* Glaciers are powerful eroders: As glaciers move, they scrape and grind against the underlying rock, breaking it down into smaller pieces. This process is called glacial erosion.
* Carrying the debris: The broken rock fragments, along with soil and other debris, become embedded in the ice. Glaciers act like giant conveyor belts, transporting this material.
* Deposition when they melt: When glaciers melt, they release the rocks, soil, and other debris they've been carrying. This deposition of material is called glacial till.
* Landforms created by glacial deposition: Glacial till creates distinctive landforms, including:
* Moraines: Ridges of till deposited at the edge of a glacier.
* Drumlins: Elongated hills of till shaped by the flow of a glacier.
* Eskers: Long, winding ridges of sand and gravel deposited by meltwater flowing beneath a glacier.
So, the rocks you find in areas that were once glaciated are often evidence of the glaciers that once existed there.
