128 
IOWA ACADEMY OP SCIENCE 
Explanation of Plate IX. 
Fig. 1. A denuded Kansan Area with much sand, even on the highest surfaces. Near 
center of Sec. 6, T. 87 N., R. I. E. (See p. 109.) 
Pig. 2. A section in sand pit at Gladstone, 111., showing loess resting upon laminated 
sand. The loess is fossiliferous, and grades downward into fine sand 
which shows the laminated structure which may be found in sand dunes 
built up by gentler winds. It is evidently a sand dune capped with loess. 
Sand rune topography is evident in the vicinity. (See p. 109.) 
