Fig. 2 - Generalized cross section through the Grand
Canyon from the north to south rim.
An interesting piece of triva about the canyon is that the north rim is 300-370 m higher than the south rim. The contrasting height has to do with the fact that the sedimentary rock units are not lying flat. The units arch upwards because they are sitting on the southern flank of the dome that the Colorado River carved through.

The canyon was formed by the dual process of the Colorado River down cutting and carving its way through the soft sedimentary rocks, and regional uplift.

Fig.3 - Generalized stratigraphic section of rock units in the Grand Canyon