26. SAND DUNES NEAR LAKE MICHIGAN A WIND-FORMED SOIL 

 THAT IS VALUELESS 



Sometimes drifting sand covers valuable farm soils 



; - 



- 



* x r>*> 



27. THE EVERGLADES OF FLORIDA A SOIL BUILT LARGELY BY 



THE DECAY OF PLANTS 

 Some day these glades will be drained and will become rich farming land 



