NATURAL AREAS AND REGIONS 



377 



(S.E.) also should be reserved before 

 it is too late. 



BIBLIOGRAPHY 



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13. MICHIGAN 



BY L. R. DICE, LYNDS JONES (Birds), 



AND HELEN T. GAIGE (Reptiles and 



Amphibians) 



I. TOPOGRAPHY AND CLIMATE 



Most of the topographic features of 

 Michigan are due to the action of the 

 former continental glaciers in forming 

 moraines, drumlins, outwash plains, 

 lakes and other tj^pical glacial features. 

 Subsequent erosion has modified this 

 glacial topography only slightly. The 



