Geologic assessment of environmental impact in Lake Macatawa,Michigan |
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| Authors: | John B Anderson Richard Wheeler Charles P Dunning Sue Shepley Marion Fowke |
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| Institution: | (1) Department of Geology, Rice University, 77001 Houston, Texas;(2) Department of Geology, Florida State University, 32306 Tallahassee, Florida;(3) Department of Biology, Hope College, 49423 Holland, Michigan |
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| Abstract: | A historical record of the effects of human development upon Lake Macatawa is established using geologic criteria. Significant
cultural events are recognized using the pollen record, particularly ambrosia/vesiculate pollen ratios, and occurrences of
detrital and chemical contaminants within the more recent sedimentary column. Detrital contaminants include such things as
cinder and ash from coal burning power plants and animal hair from early tanning operations. Trace metal contaminants, frequently
associated with specific industrial events, are particularly useful in establishing a modern sedimentary chronology.
The impact of human activity upon Lake Macatawa is measured using fossil diatoms. The advantage of this method of environmental
impact assessment is that it provides a historical perspective in which changes within an environment are related to its natural
conditions. |
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