Crawford Lake Conservation Area is a conservation area owned and operated by Conservation Halton near the community of Campbellville in Milton, Halton, Ontario, Canada. It is categorized as a regional environmentally sensitive area, an Ontario area of natural scientific interest, and part of the Niagara escarpment world biosphere reserve. The conservation area contains Crawford Lake. A study made in 1971 determined that the lake was meromictic, which makes the lake a prime site for archeological and geochemical studies. Using pollen analysis, reconstruction of the history of the area over several hundred years was possible.
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