CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Crampton, C.B.; and Rutter, N.W.
Date : 1973
Title : A geoecological terrain analysis of discontinuously frozen ground in the upper Mackenzie River Valley, Canada
Publication : Permafrost: North American Contribution, Second International Permafrost Conference, Yakutsk, USSR. Washington, DC: National Academy of Science, Publication
Issue : 2115:
Page(s) : 101-105
Abstract
Aerial photographs may be used for rapid identification of terrain types in terms of surficial geology, microrelief, and vegetation, which is significant regarding permafrost conditions. High forest is indicative of freely drained sites, such as alluvial terraces, fans, and glaciofluvial deposits, and sand dunes, which offer the best construction sites. Relatively featureless flats on aerial photographs, though often with local reticulate bogs, are indicative of seasonally waterlogged lands on lacustrine or till deposits that present the engineer with problems typical of permafrost-free areas. However, where the terrazoid pattern can be seen on aerial photographs, raised peat with near-surface permafrost and ground ice is intricately associated with pools, often without permafrost. These patterns are characteristic of lacustrine and till deposits that contain ground ice. On uplands, with characteristic till morphology, a deranged drainage pattern on flats, especially a subparallel drainage pattern on slopes delineated by lichen on raised parts and sphagnum in drainage runnels, in indicative of a shallow permafrost table and ground ice.
Bibliography of Canadian Geomorphology