Figure 6

Measurement uncertainties at Loc 2. A. Percentage variation as a function of a unit’s position within the deposit. B. Filled symbols represent uncertainties calculated as the percentage difference between measurement standard deviation and the average thickness for each unit at each location. Natural Variance is calculated by averaging measurements for each subunit at Loc 2 and percentage error was calculated as for measurement uncertainties. Regression indicates negative correlations, best described by a power-law relationship for both observational uncertainty (29.0x^-0.3; R² = 0.3) and natural variance (61.1x^-0.4; R² = 0.7).