106 PHYSICAL GEOLOGY 



10. Indicate three ways in which the wind might form mounds 

 such as those shown in Figure 100. 



FIG. 100. Mounds near Iron Mountain, Oregon, due to the work of the 

 wind. (Russell, U.S. Geol. Sure.) 



REFERENCES 



BONNET : The Work of the Atmosphere, in The Story of Our Planet, 



pp. 91-102. (London, 1893.) 

 COBB : Where the Wind does the Work, in Nat. Geog. Mag., Vol. XVII, 



pp. 310-317. 

 CORNISH : On the Formation of Sand Dunes, in Geog. Jour., Vol. IX, 



pp. 278-309. 

 COWLES : The Ecological Relations of the Vegetation of the Sand 



Dunes of Lake Michigan, in Botanical Gazette, Vol. XXVII, 



pp. 95-117, 167-202, 281-308, 361-391. 

 DAVIS : The Geographical Cycle in an Arid Climate, in Jour, of 



Geol., Vol. XIII, pp. 381-407. 



GEIKIE, J. : Earth Sculpture, .pp. 250-265. (New York, 1898.) 

 HITCHCOCK : Controlling Sand Dunes in the United States and 



Europe, in Nat. Geog. Mag., Vol. XV, pp. 43-47. 

 MERRILL : The Principles of Rock Weathering, in Jour, of Geol., 



Vol. IV, pp. 704-724, 850-871. 



Rocks, Rock Weathering, and Soils. (New York, 1897.) 

 UDDEN : Erosion, Transportation, and Sedimentation performed by 



the Atmosphere, in Jour, of Geol., Vol. II, pp. 318-331. 



