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Manitoba from the Air
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Description
Tonal Variations North of Elphinstone

Shown here is an area of lake-strewn ground moraine in the east and the valley of the upper part of the Little Saskatchewan River 1 in the west. The lakes are mainly dark-toned 2 except for those in the southeast 3 where specular reflection is occurring. The large lake in the extreme southeast 4 is Thomas Lake; it is large enough that winds blowing across it can produce waves leading to slight tonal variations and a silky texture 5. Note also tonal variations in harvested fields in the north centre: light-toned areas 6 are covered by stubble, whereas irregularly shaped dark-toned areas 7 result from stubble burning, a common practice in southern Manitoba in 1947.

Figure 1.5

Tonal Variations North of Elphinstone