University of Toronto, Toronto, Ontario: 16mm.
University of Waterloo Audiovisual Services Catalog.
"Centres on the varieties, nature, and ecological function of the muskegs. Evolution is considered by looking at the arctic ice desert, and North American temperate regions, seeing how life has evolved at any given distance from the ice cap. A distance of 1500 miles from the edge of the ice represents about 5,000 years in time. About 10 different stages of evolution are illustrated."