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Published byPatrick Justin Berry Modified over 6 years ago
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Glaciation – Extent in North America 10,000 Years Ago
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Formation of a Glacier
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How a Glacier Moves
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How Ice Erodes Scrapes or scours – Rocks are embedded into the bottom of the ice sheet and erode the bedrock as it flows. Conveyor belt – Embedded rocks are carried in the ice and deposited in the front as debris. Plucking – Ice freezes around the rock and pulls or plucks it away as it flows. Bulldozer – Material is pushed along in front.
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Glacial Features in Waterloo Region
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Features Caused by Erosion
Picture an ice sheets 1.5 km high carving… Lake basins (Great Lakes) Spillways – U-shaped river valleys (Grand River) Striations
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Glacial Spillway – U-shaped Valleys
Grand River
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Glacial Striations
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Features Caused by Deposition
Till – Debris left behind by a glacier when it dropped its contents of sediment (big & small). Provides good drainage for cropland.
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Outwash Plain
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Kettle Lakes
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Formation of a Kettle Lake
Local example: Spongy lake (near Baden)
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Kame Moraine Baden Hills Horseshoe Valley Mt. St. Louis- Moonstone
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Formation of Moraine
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Cross-section of Kame Moraine
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Drumlins – Egg Shaped Hills
Movement of ice Drumlin fields in Guelph and Peterborough
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Eskers
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Thanks to the Glaciers, Waterloo Region has…
Fertile agricultural lands Till aggregate used in construction Moraines that filter and purify water Fresh water rivers and lakes Scenic landscapes
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