Small Peat Plateau with collapse scar
A typical example of the type of permafrost landforms in wetlands is provided by the slide below taken from a beaver aircraft using a telephoto lens in 1972. Area A shows a collapse scar where permafrost has melkted. The small black spruce trees are slowly being submersed in the waterlogged scar. The area around B is typical of the non-frozen wetland. Sparse growth of Tamarack (Larix Laricina) can be seen here a a poorly developed ribbed fen. Drainage in the fen wetland is from right to left. Around D is a typical growth of stunted Black Spruce (Picea Mariana) can be seen. Light clored ground cover between the spruce is a combination of lichen and mosses. There is a significant 31 year time difference between the two images but initially no significant differences are apparent and melting rates seem extremely slow. More information: www.geostrategis.com/p-permafrost-churchill.htm