CGRG Bibliography of Canadian Geomorphology
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Author : Ellwood, J. R. and Nixon, J. F
Date : 1983.
Title : Observations of soil and ground ice in pipeline trench excavations in the South Yukon
Publication : Permafrost : Fourth International Conference, proceedings, July 17-22, 1983. - Washington, D.C. : National Academy Press,
Issue : 4:
Page(s) : 278-282.
Abstract
During the winter of 1980-1981, Foothills Pipe Lines (Yukon) Ltd. excavated several long trenches in permafrost in order to install sections of 1.22 m diameter pipeline at the Quill Creek Test Facility in the South Yukon. A total of 900 linear meters of trench was excavated mostly by wheeled ditcher to a minimum depth of 2 m. The ash layer was deposited at a reasonably well-defined date in the recent geological past and therefore allows rates of deposition or growth of surface layers to be established. Several photographs are presented to illustrate the location of the different soil strata and the shapes of several massive ice features. Some of the massive ice forms observed in the trench walls are believed to be relict ice wedges. The trench allowed a three-dimensional impression of the ground ice to be obtained, which is not normally possible from boreholes. Some additional observations are made relating to the success of wheeled ditchers in trenching the different soil types at the Quill Creek Test Facility.
Bibliography of Canadian Geomorphology