5. EROSION OF A MOUNTAIN IN MONTANA 



The soil made on the mountain by weathering has been mostly washed away to make 

 the fertile valley below 



6. NIAGARA FALLS, CANADIAN SIDF 



The Falls are moving backward towards Lake Erie at the rate of 4 feet n year. The rock par- 

 ticles worn away by the cataract are deposited as soil many miles down stream 



