From introduction: 'From 8 to 18 August 1968, a forest-tundra fire burnt in the Inuvik, Northwest Territories area (Hill, 1969). The fire destroyed tens of square kilometres of lichen-rich tundra and forest-tundra. As a direct result of the fire, some bare hillslopes became gullied, sediment was transported into otherwise clear lakes, ice-rich permafrost was exposed to thermal erosion and thermokarst activity, flow slides developed, bulldozed firebreaks subsided, and the active layer thickened over most regions. Natural revegetation has been rapid, in some areas, since 1968. Numerous papers have already been written on various aspects of the Inuvik fire (e.g. Heginbottom, 1973, 1974; Hill, 1969; Mackay, 1970;Wein and Bliss, 1973). Some years earlier, Nowosad (1963) discussed the increase in thickness of the active layer, after clearing, at the Inuvik Experimental Farm.'