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Littlefield Lake, Michigan: carbonate budget of Holocene sedimentation in a temperate-region lacustrine system

Littlefield Lake is in a late stage of marl lake evolution characterized by reduced rates of carbonate precipitation. Long and short term carbonate budgets show that the volume of calcite in the lake basin is 3-7 times that expected from annual calcium depletion in the epilimnetic water. This Holocene decrease in carbonate production is also recorded as a gradual increase in the amount of organic and carbonate material in cores from the deep lake basin. Late-stage reduction in carbonate production is evidently a natural consequence of lakeward progradation of littoral marl benches, encroachment of terrestrial vegetation, and reduced colonization by carbonate-producing lake macrophytes.