Canadian Shield

Canadian Shield
Canadian Shield
Stratigraphic range:
Type	Shield
Unit of	North American craton
Sub-units	Laurentian Upland; Kazan
Area	8,000,000 km2
Location
Coordinates	52°00′N 71°00′W / 52.000°N 71.000°W
Region	North America
Country	Canada; United States; Greenland
	; The Canadian Shield is a broad region of Precambrian rock (pictured in shades of red) that encircles Hudson Bay. It spans eastern, northeastern, and east-central Canada and the upper midwestern United States.

The Canadian Shield (French: Bouclier canadien [buklje kanadjɛ̃]), also called the Laurentian Shield or the Laurentian Plateau, is a geologic shield, a large area of exposed Precambrian igneous and high-grade metamorphic rocks. It forms the North American Craton (or Laurentia), the ancient geologic core of the North American continent. Glaciation has left the area with only a thin layer of soil, through which exposures of igneous bedrock resulting from its long volcanic history are frequently visible.^[3] As a deep, common, joined bedrock region in eastern and central Canada, the shield stretches north from the Great Lakes to the Arctic Ocean, covering over half of Canada and most of Greenland; it also extends south into the northern reaches of the continental United States.

^ Cite error: The named reference ca-atlas was invoked but never defined (see the help page).
^ Cite error: The named reference britannica was invoked but never defined (see the help page).
^ Marshak, Stephen (2009). Essentials of geology (3rd ed.). New York: W.W. Norton. ISBN 978-0393932386.

[ca-atlas-1] Cite error: The named reference ca-atlas was invoked but never defined (see the help page).

[britannica-2] Cite error: The named reference britannica was invoked but never defined (see the help page).

[EG-3] Marshak, Stephen (2009). Essentials of geology (3rd ed.). New York: W.W. Norton. ISBN 978-0393932386.

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