Figure 5. Comparison of new Late Ordovician–Silurian δ34SCAS datasets from this study and those previously published (Jones and Fike, 2013; Present et al., 2015). Note the clear overlap in δ34SCASvalues from bulk- and brachiopod-carbonate throughout the Hirnantian. Approximate chronostratigraphic locations of brachiopod component CAS samples are marked as yellow stars.