EntityQ5032319· pop 5· linked from 12 articlesCanfield oceanSign in to saveSuggested composition of the ocean in the middle to late ProterozoicConnectionsanoxic eventEntityhypoxiaEntitycopperEntityInternational Standard Book NumberEntitymolybdenumEntitydigital object identifierEntityInternational Standard Serial NumberEntitygeochemistryEntityProterozoicEntityhydrogen sulfideEntitypyriteEntityNatureEntityQ180686EntityweatheringEntitybibcodeEntityextinction eventEntityper milleEntityPermian-Triassic mass extinctionEntitysulfideEntityQ22908627EntityCategoriesGeology theoriesOceanographyPaleoclimatologyProterozoic