Stratigraphic variation in the carbon isotopic (δ13C) value of marine carbonate and organic matter preserved within it has become a popular tool for supporting paleoclimatic hypotheses and refining stratigraphic correlation. Virtually every important biostratigraphic and sequence stratigraphic event of the last 800 million years has had a δ13C dataset collected to aid in interpreting the causal environmental factors that contributed to the event. The stratigraphic resolution obtainable using δ13C has yielded critical temporal constraints on the interplay between carbon cycle variation and environmental events such as mass extinction and eustasy. Although the non-uniqueness of...

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