f 



PLATE I 



FIG. 1. Dunes on 

 coast of New Jer- 

 sey. Scale, about 

 1 mile per inch. 

 Contour interval, 

 10 feet. (Cape 

 May Sheet, U. 

 S. Geoi. Surv.) 





FIG. 2. Dunes a- 

 lonjj Arkansas 

 River in Kan-a<. 

 Scale, about 2 



. miles per inch. 

 Contour interval. 

 20 feet. (Larnrd 

 Sheet, U. S. Geol. 

 Surv. ) 



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

 Contour interval, 20 feet. (Camp Clarke Sheet, U. S. Geol. Surv.) 



