* Till: Till is unsorted, unstratified glacial sediment. It's a mixture of clay, silt, sand, gravel, and boulders, all jumbled together.
* Glacial Erosion: As glaciers move, they scrape and pluck material from the bedrock beneath them. This material gets incorporated into the ice.
* Glacial Deposition: When glaciers melt, they deposit the till they've been carrying. The way this till is deposited creates various landforms, including:
* Moraines: These are ridges of till that form at the edge of a glacier or where two glaciers meet.
* Drumlins: These are elongated, teardrop-shaped hills of till, often oriented in the direction of glacial flow.
* Eskers: These are winding ridges of sand and gravel deposited by meltwater streams flowing within or beneath the glacier.
In summary: Mounds and ridges of till are landforms created by the accumulation and deposition of glacial till, a mix of unsorted sediment. They provide important clues about the history of glacial activity in a region.
