The importance of determining paleoelevations in highland areas is highlighted by the discrepancies between various studies of the Colorado Plateau. The data from our analysis (Figure 3 of Sahagian et al., 2002a) can be fit with a straight line with a best fit that has a y-intercept of 660 m (Libarkin and Chase, 2002). However, the difference between the R2 values of 0.69 (logarithmic curve) and 0.71 (straight line) is small, and perhaps not significant given the few points that define the curve and the magnitudes of the uncertainties that characterize them. If a single...

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