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Manitoba from the Air
Image Options
Show Trace
Description
Vegetation on the Riding Mountain Escarpment

On this photo of the Riding Mountain Escarpment, drainage is to the east in a series of steep-sided valleys of which Dead Ox Creek 1 in the centre is the largest. The creeks have eroded down through a thick veneer of moraine to reveal the underlying Cretaceous shales—white-toned—in many locations 2. This is particularly noticeable on the outside of creek bends 3, and at one location, Bald Hill in the north 4, a sharp-crested ridge of shale is exposed.

The natural vegetation in this area is mixed woodland with deciduous trees: aspen (Populus tremuloides), balsam poplar (Populus balsamifera), and birch (Betula papyrifera) dominating. These produce a light-grey tone 5, and in some places the rounded crowns of trees can be seen 6 producing a mottled texture. Darker toned coniferous trees, white spruce (Picea glauca) and black spruce (Picea mariana), dominate in a few places 7, and isolated conifers can be identified on the basis of their dark tone and triangular shadow shapes 8.

The only indications of human impact on the area are PTH 19 9 that crosses Riding Mountain from west to east and one of the park’s walking trails 10.

Figure 5.13

Vegetation on the Riding Mountain Escarpment