| The St. Clair River delta, the largest in the Great Lakes area, is located astride the border between Michigan, United States of America (U.S.A.), and Ontario Canada. It resembles a classic river-dominated delta system, with a typical "birds foot" morphology The St. Clair River delta consists of six islands from west to east: Seaway, Bassett, Squirrel, Walpole, the artificial Pottowatamie, and St. Anne. This study is performed on three continuous vertical sediments cores The cores were taken along a north-south transect of Walpole island.;The St. Clair River delta is composed of a premodern and modern sediments. Sediments of the premodern delta were deposited from 3 500 to 5 000 B.P. at an elevated lake level. The sedimentation of modern sediments started about 3 500 B.P. and continues to this day. Beneath the delta, lacustrine and sediments are found.;The clay minerals of the day fraction are determined to identify the glacial detrital sources, the sedimentary processes and the past environmental changes.;Two sites for shallow groundwater sampling were selected in the centre of Walpole Island to evaluate the environmental impact of the landfill and surficial disposal. (Abstract shortened by UMI.)... |
