Chapter 5: Vegetation
In southern and west central
Individual animals are too small to appear on all except very large-scale images. However, some animals (e.g. beaver) profoundly affect drainage systems.
5.30: Palsas in Wet Fenland South of Churchill
In this area a surficial layer of marine silt overlies silty till.[i] It lies within the area of discontinuous permafrost; i.e., there are areas where water below ground is continually frozen. A series of creeks including Alston Creek 1 and Wakworth Creek 2 drain northward ultimately into the
The thin white line in the west 10 is the Hudson Bay Railway leading north to Churchill. The whistle point Bylot 11 is located at the bend in the line. Construction began at The Pas in 1910 and was completed on March 29, 1929. The total distance from The Pas to Churchill is 510 miles (816 km), much of it over spongy muskeg and discontinuous permafrost. The building of the line was a remarkable engineering feat, but maintenance costs over discontinuous permafrost have been high and in recent years the existence of the line has been constantly threatened. It is now owned and run by an American company.
Figure 5.30: Palsas in Wet Fenland South of Churchill
Vertical air photograph: A17406-57
Flight height: 30,000 feet a.s.l.; lens focal length: 88.28 mm
Scale: 1:105,000 (approx.)
Date: July 31, 1961
Location of lake 8: 58° 24' North, 93° 54' West
Map sheets: 1:250,000 54L Churchill
1:50,000 54K/5 Warkworth Creek
[i] Interpretation from Mollard and Janes op cit., 1984,132.