The corner of a massive cliff overlooking the Colorado River provides a vivid example of the power of flowing water to alter the face of the earth over hundreds of thousands of years. The façade of this cliff is a study in variegation – the textures of the different colors, patterns, and shapes are defined by warm evening light as well as soft shadows. Note the difference made by the play of light and shadow – the shadowed textures appear strikingly different from the illuminated textures.