PLATE I 



FIG. 1. Dunes on 

 coast of New Jer- 

 sey. Scale, about 

 1 mile per inch. 

 (Cape May Sheet, 

 U.S.Geol Surv.) 



FIG. 2. Dunes a- 

 1 o n g Arkansas 

 River in Kansas. 

 Scale, about 2 

 miles per inch. 

 (Lamed Sheet, 

 U. S. Geol. Surv.; 





FIG. 3. Dunes in plains of Nebraska. Scale, about 2 miles per inch. 

 (Camp Clarke Sheet, U. S- Geol. Surv.) 



