wilson cycle plate tectonics ocean basin cycle continental drift geology and paleontology

vanadium cycle vanadium cycling trace metals geochemistry geology and paleontology

supercontinent cycle plate tectonics continental assembly geologic cycles geology and paleontology

silica cycle silicon cycling marine biogeochemistry weathering geology and paleontology

selenium cycle selenium cycling trace elements biogeochemistry geology and paleontology

phosphorus cycle phosphorus cycling nutrient cycles soil chemistry geology and paleontology

ozone–oxygen cycle atmospheric chemistry ozone layer oxygen photochemistry geology and paleontology

methane cycle methane cycling greenhouse gases microbial processes geology and paleontology

mercury cycle mercury cycling bioaccumulation environmental pollution geology and paleontology

manganese cycle manganese cycling redox chemistry marine sediments geology and paleontology

lithium cycle lithium cycling weathering geochemistry geology and paleontology

lead cycle lead cycling heavy metals environmental pollution geology and paleontology

iron cycle iron cycling redox chemistry marine biogeochemistry geology and paleontology

iodine cycle iodine cycling marine chemistry atmospheric chemistry geology and paleontology

gold cycle gold cycling mineral deposits geochemistry geology and paleontology