title: Biogeochemistry: Toxic Cambrian oceans.
authors.forename: Graham
authors.initials: G
authors.lastname: Shields-Zhou
mesh_terms: D000818:Animals; D001419:Bacteria / Q000378:metabolism; D005075:Biological Evolution; D057486:Carbon Cycle; D002247:Carbon Isotopes / Q000032:analysis; D053476:Extinction, Biological; D019015:Geologic Sediments / Q000737:chemistry*; D049690:History, Ancient; D007501:Iron / Q000032:analysis / Q000737:chemistry; D008954:Models, Biological; D008982:Molybdenum / Q000032:analysis; D009792:Oceans and Seas; D010100:Oxygen / Q000032:analysis*; D012623:Seawater / Q000737:chemistry*; D013440:Sulfides / Q000032:analysis* / Q000737:chemistry; D013460:Sulfur Isotopes / Q000032:analysis
chemical_list: D002247:Carbon Isotopes; D013440:Sulfides; D013460:Sulfur Isotopes; C011342:pyrite; D008982:Molybdenum; D007501:Iron; D010100:Oxygen