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Upper: Composite isotope profile (δ¹³Ccarb) for Mississippian-Permian (includes data from Fielding et al., 2008; Isbell et al., 2008) (Grossman et al., 2008)
Middle: Isotope profiles (δ¹⁸Ocarb and δ¹³Ccarb).
Lower: Two isotope profiles (δ¹⁸O) for Mississippian-Permian (data from Fielding et al., 2008; Isbell et al., 2008 in lower profile) (Grossman et al., 2008).