The loess covers both the watersheds and the valleys.
The loess is used with clay for the production of brick.
The basin is a loess region and is unfit for rice, but it produces other fine crops.
There are four kinds of soil in Northern Europe: glacial till, alluvial, loess and geest.
The loess was created by the drifting of fine sand and dust.
The loess soil, chiefly a mixture of porous clay and carbonate of lime, forms the bluffs that border the bottom lands of the Missouri.
The loess is reddish-brown, buff or grey according to the varying proportions of iron oxide.
This wide-spreading loess area was formed partly of wind-blown sand and partly of detritus from the mountains.
The loess stretches out over terraces at some distance from the mountains.