The Laurentian Great Lakes — Lakes Superior, Michigan, Huron, Erie and Ontario — are the most studied system in lake geochemistry and have well-preserved chronological profiles.
Metals play numerous critical roles in natural and human-influenced characteristics of lake ecosystems, so patterns in the historical records of metals from sedimentary cores provide important information about environmental baselines and human impact.
In two recent studies, researchers summarized what was previously known of metals paleogeochemistry in the Laurentian Great Lakes, then performed a geochemical analysis of eleven sediment cores throughout the Great Lakes basin.
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