Sahagian et al. (2002) provide an interesting look at the uplift history of the Colorado Plateau through an analysis of paleoelevations estimated using a study of basalt vesicularity. They conclude that the Colorado Plateau experienced slow uplift beginning ca. 25 Ma, with rapid uplift since 5 Ma. These conclusions are based upon an analysis of the data that we think is incomplete. In our analysis (1) the best fit through the data of Sahagian et al. (2002) is not a logarithmic curve, but rather a straight line; (2) the logarithmic best fit itself is indicative not of uplift at a...

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