Fig. 3: Evolutionary power spectral analysis of terrestrial and marine δ13C record.

Evolutionary power spectral analysis of the δ13Ccarb of Nanxiong Basin (a) and the δ13Cbulk of ODP 1262 (b) for the complete records; evolutionary power spectral analysis of the δ13Ccarb from the Nanxiong Basin for two discrete time windows: 65.85–65.0 Ma (c) and 66.6-66.0 Ma (d); evolutionary power spectral analysis of the δ13Cbulk of ODP 1262 for two discrete time windows: 65.9-65 Ma (e) and 66.6-66.0 Ma (f). Blue represents low spectral power, and yellow represents high spectral power.