Fig. 3: Stratigraphic information and geochemical profiles in Duli from South China.
From: Photic-zone euxinia had a major role in the Devonian-Carboniferous boundary mass extinction

Including lithology, conodont zones16,62, inorganic carbon isotope (δ13Ccarb), whole rock Hg concentration, carbonate-free Hg (Hgcf) concentration, residual Hg (HgR), Δ199Hg, δ202Hg and Ce/Ce* values. CZ Conodont zones, ckI costatus-kockeli interregnum, k kockli, S. Siphonodella, EDHC End-Devonian Hangenberg Crisis, NCIE Negative carbon isotopic excursion, RRSE robust residual standard error, SD standard deviation.