We filled spatial and temporal gaps in a comprehensive geochemical analysis of 11 sediment cores collected from all five Great Lakes. To date, this important system has been considered in parts for inorganic geochemistry, hampering basin-wide conclusions regarding metal contamination. The Laurentian Great Lakes are the most studied system in this field, and they have well-preserved chronological profiles. Lakes provide ideal environments for geochemical studies because they have steady deposition of fine grained material suitable for fixation of pollutants. Geochemical analyses applied to lake sedimentary records can reveal the history of pollution by metals and the effects of remedial efforts.
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