Canadian Geographic
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INSIDE: Plate tectonics Go now!

Canada rides on one of 30 or so tectonic plates, or slabs, which underlie the earth’s continents and oceans.


Building mountains

Viewed by satellite, the face of Canada reveals six clearly defined landform regions: Cordillera, Interior Plains, Canadian Shield, Great Lakes–St. Lawrence, Appalachian, and Arctic. All these regions occupy significant portions of Canada’s vast expanse. Each possesses similar geologic structures, physical features, climatic conditions, soils, and vegetation. Considered as a whole, Canada’s landforms encompass an unrivaled diversity of landscapes: spectacular mountain ranges, sweeping plains, rocky uplands, temperate lowlands, and frigid tundra. The forces of nature — our daily weather, for example — actively shape landforms. Some forces level landforms, others rebuild them. Over time, the impact of water, ice, and wind slowly and steadily reduce the mighty Rockies to rubble, while rivers bear away sediments to deltas and seabeds where new landforms wait to be born.

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Geology


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Quiz :

What stripped away the mountains and volcanoes that once covered the Canadian Shield?

Wind erosion
Volcanic activity
Glaciers