The actual height of the Colorado Plateau is 2400m. One possible explanation is that the crust of the Colorado Plateau is less dense than the average continental crust. There is actually good evidence that this is the case via a process called delamination. Even within the continental crust, there is a density trend with depth (increasing density with depth, due to a greater proportion of mafic minerals). So, removal of the bottom crust will leave a lighter crust overall. In the case of the Colorado Plateau, the theory is that a plume of the hot deep mantle has melted the underside of the crust. Calculate the density of the crust would have to be using the elevation h = 2400m, rhom = 3300 kg/m3, observed crustal thickness of 43.1km, and average crustal thickness = 35km.