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Manitoba from the Air
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Structural Control of Drainage East of Lake Winnipeg



This satellite image shows an area east of Lake Winnipeg 1 that is seen in the southwest corner. The area is part of the Canadian Shield and is underlain by Precambrian rocks in which fractures are exploited by drainage lines, for example, the Bloodvein River 2. The river has a series of straight stretches 3 and some sharp angular bends 4. Its course includes many rapids and waterfalls.[i] The Leyond River 5 that joins from the east also has structurally determined straight stretches 6. Other fracture zones, with no obvious drainage, can also be seen 7. The Bloodvein is generally regarded as one of the great canoe routes in Canada. “In 1985 the government of Manitoba designated a 4,000 square kilometre area east of Lake Winnipeg, including the Pigeon (north of the area shown) and Bloodvein watersheds, as the province’s first wilderness-class park. Six years later, the Bloodvein received its prestigious designation as a Canadian Heritage River for its significance in terms of human history and natural heritage, and for its potential for wilderness tourism.”[ii] The Bloodvein, which flows from Ontario into Manitoba, is famous for pictographs found at cliff sites along its route. However, the only evidence of human activity on the image is a light-toned zone 8, which is the route of a power line.


[i] For details see, Wilson, H. and Aykroyd, S. Wilderness Rivers of Manitoba. Merrickville, Ontario: Canadian Recreational Canoeing Association, n.d., 47-54.

[ii] Wilson, H. and Aykroyd, S. Wilderness Manitoba: Erin, Ontario: Boston Mills Press, 1999, 57.

Figure 3.5

Structural Control of Drainage East of Lake Winnipeg