NATURAL AREAS AND REGIONS 



377 



(S.E.) also should be reserved before 

 it is too late. 



BIBLIOGRAPHY 



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 + 78 pi. 



Cowles, H. C. 1899. The Ecological 

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13. MICHIGAN 



Bv L. R. Dice, Lyxds Jones (Birds), 



.VXD Helen T. G.vige (Rcptilc.f and 



Arnphibians) 



I. TOPOfJUAPIIY A.VD CLIMATE 



Most of the topographic features of 

 Michigan are due to the action of the 

 fonner continental glaciers in forming 

 moraines, drumlin,'?. nutwash plains, 

 lakes and other typic;d glacial features. 

 Subsequent erosion has modified this 

 glacial topography only slightly. The 



