20 



PHYSIOGRAPHY 



In parts of China and Europe, and over extensive areas in the 

 Mississippi basin, there is a layer of peculiar earthy material, a large 



-<m in 



Fig. 11. Bluff of loess at Kansas City. (Missouri Geol. Surv.) 



part of which was deposited by the wind, as dust is now being 

 deposited on the bluffs of the Missouri and some other rivers. This 



Fig. 12. Fagade of a group of buildings in a bluff of loess, Province of 

 Shansi, China. (Richthofen.) 



