There are other important markers in the lake sediments, including spherical carbon particles produced by the burning of fossil fuels in power plants and nitrates from the mass application of chemical fertilisers.

湖泊沉积物中还有其他重要的标志，包括发电厂燃烧化石燃料产生的球形碳颗粒和大量施用化肥产生的硝酸盐。