Plate VII 



FIG. 1. Mound -shaped dunes along a river, near Larned, 

 Kansas. Scale about 2 miles per inch. Contour in-, 

 terval, 20 ft. (U. 8. Geol Surv.) 



FIG. 2. Dunes at the south end of Lake Michigan. All the elevations shown 

 on the map are dunes, which are ridge-like rather than mound-like. 

 Scale about 1 mile per inch. Contour interval. 10 ft. (U. S. Geol. Surv.) 



FIG. 3 Dunes on the plains of western Nebraska. Scale about 2 miles per 

 inch. Contour interval, 20 ft. (U. S. Geol. Surv.) 



