CGRG Bibliography of Canadian Geomorphology
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Author : Barnes, R.E.
Date : 1991.
Title : A study of postglacial loess and paleosols in the Lethbridge area of southern Alberta.
Publication : Unpublished MSc thesis. Wueen's University at Kingston.
Issue :
Page(s) :
Abstract
A study of soils developed on Holocene loess was undertaken to determine the postglacial soil-landscape evolution near Lethbridge, Alberta. The post-glacial stratigraphy of a loess mantled area along the Oldman River was reconstructed from drill cores taken along five transects. Loess thicknesses and the extent of loess mantling in this area were determined to give an indication of the paleoenvironment. Glacier Peak tephra indicates that Glacial Lake MacLeod which covered this area immediately following deglaciation must have drained by at least 11 200 years BP. The lack of a paleosol on the glaciolacustrine surface indicates that loess mantling must have begun immediately following deglaciation. The loess complex examined in this study was determined to contain two loess units: a lower, silt dominated unit and an upper, sand dominated unit. Rates of accumulation of the two units were determined from two tephra beds, Glacier Peak tephra and Mazama tephra. The relative chronology of the postglacial soil-landscape evolution and the soil forming intervals was determined. Soils were studied in terms of soil genesis and as stratigraphic markers.
Bibliography of Canadian Geomorphology