Dust: The breath of the earth. Unlike the breath of other life forms, it is heavy and can accumulate in drifts and hills. The image below shows the dust edge of  The Horse Heaven Hills, that first accumulated against the southern face of the glaciers, as the earth breathed under the cold and their weight, and then was washed here by huge floods when the ice melted away. Breath, though, it remains. As it is the breath of the earth, one can plant crops in it. The heights of this breath (dust) are cropped with wheat.

The Horse Heaven Hills at Kiona, Washington