Origin
The Waterloo Moraine was formed as the three ice lobes of the Laurentide ice sheet retreated across what is now Waterloo Region from Lake Huron in the west, Georgian Bay in the northeast, Lake Ontario in the east and Lake Erie in the southeast. As the glacier moved, it carried with it huge boulders, sand, gravel and debris. As the ice disappeared, the Waterloo Moraine remained, a huge complex of glacial sediments that is between 30 metres and more than 100 metres thick. Meltwater streams cascading from the surface of the ice lobes carried enormous deposits of sand and gravel and blocks of bedrock.
The glacial sediments constituting the moraine rest upon the Guelph and Salina carbonate bedrock formations.
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