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Summed probability distribution (SPD) for Great Basin (Hydrological Unit 16 in Kelly et al.’s study). The 4727 14C dates are plotted as a 200-y running mean (dark line) and compared to the 95% CI (gray band) from the null exponential model. The statistically significant positive deviations are highlighted in pink and significant negative deviations appear in blue (ref. 8, fig. 13.2). Image Credit: Reprinted with permission from ref. 8.
