Extended Data Figure 4 : Selection of age-model tie points.

From: Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum

Extended Data Figure 4

Comparison of bulk carbonate δ13C (top) and δ18O (bottom) values for Site 401 and Site 690 (ref. 25). Vertical lines show the age tie points used to derive the age model relative to the PETM CIE (see Methods).