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Chapter 3: Geologic Structure and Landforms

3.84: Landforms of Southwestern Manitoba and Southeastern Saskatchewan

This image was obtained from Landsat I using the Multispectral Scanner (MSS) sensor, recording band 7 (0.7-0.8 mm—infrared). The sensor at a nominal altitude of 900 km (559 miles) covers a large part of southwest Manitoba and southeast Saskatchewan. At the time, December 19, 1973, most of the surface was snow covered and appears white on the image, but tree and scrub covered areas appear dark. In the north is Riding Mountain National Park 1 with a sharp boundary reflecting the difference between natural vegetation in the park and land cleared for agriculture outside it. In the south is a parkland area (woodland and grass) surrounding Oak Lake 2 and in the southeast the wooded area of Moose Mountain 3 in Saskatchewan.

At this date, close to the winter solstice, the sun is low in the sky even at noon and this image was obtained well before noon. One result is that topographic features throw prominent shadows, so that in this image spillways and meltwater channels show up prominently. This is particularly true where they trend west/east, the best example being the Qu’Appelle Valley 4. Running into the Qu’Appelle in Saskatchewan are Kaposvar Creek 5 and Cutarm Creek 6. Also trending west/east in Saskatchewan is Pipestone Creek 7. The Assiniboine spillway runs through the centre and east of the image. Prominent segments occur in the north where the Shell River enters 8, further south near Miniota 9, east of Virden 10, and near the junction with the Little Saskatchewan River 11. Entering the Assiniboine from the north are Silver Creek 12, Birdtail Creek 13, and the Little Saskatchewan River 14. The valley of the last named is prominent in its upper 15 and lower 16 reaches but almost disappears in the centre 17 although it is just as deep as to north and south. In the southeast is the Souris spillway 18—not prominent because of the sun angle—but the very small Dand spillway 19 is surprisingly obvious.

Figure 3.84: Landforms of Southwestern Manitoba and Southeastern Saskatchewan

Figure 3.84: Landforms of Southwestern Manitoba and Southeastern Saskatchewan

Figure 3.84

Landsat I Image: December 19, 1973

This image was made by recording Band 7—0.7 to 0.8 mm—(infrared)

Scale: 1:1,000,000 (approx.)