Fig. 2: Sea-level cycle frequency and duration during periods of reduced and elevated tectonic activity.
From: Tectonic–astronomical interactions in shaping late Paleozoic climate and organic carbon burial
a Kernel density estimates of sea-level cycle durations (Myr) under two tectonic regimes: reduced tectonic activity (blue) and elevated tectonic activity (pink), corresponding to Phases II and Phases I + III, respectively. Red dots and horizontal bars denote the mean ± 1 standard deviation for each group. Inset rose diagram illustrates the distribution and concentration of cycle durations in circular space. b Circular spectral analysis (CSA) results of sea-level cycles during periods of reduced tectonic activity. Power spectrum (gold line) is plotted alongside Monte Carlo-derived confidence levels. c CSA results for sea-level cycles during elevated tectonic activity.
