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Accordig to wikipedia, the Canadian Shield is a large geological shield. It has a deep, common, joined bedrock region in eastern and central Canada and stretches North from the Great Lakes to the Arctic Ocean. The Canadian Shield was the first part of North America to be permanently elevated above sea level and has remained almost wholly untouched by successive encroachments of the sea upon the continent. It is the earth's greatest area of exposed Archaean rock.

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Additional Photos by Sam Wald (sam_wald) Silver Star Critiquer/Silver Note Writer [C: 29 W: 0 N: 22] (720)
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