This is quite an old photo of mine, taken back in 2003 on the way to a Utah ski resort with a point and shoot camera. No, the quality isn't up to par with my current standards :) but my daughter saw it, loved it, and so I thought I'd share it.
The color of the soil in this photo, taken at Cedar Breaks National Monument in southern Utah, is caused by iron oxide. Parts of it have turned white through "bleaching", a natural process wherein water dissolves the iron oxide and strips its color. Pretty interesting: http://geology.utah.gov/online/pdf/pi-77.pdf