-_-^ RED CLAY 



.*••'■- GRANITE 



r== HEAVY SILTLOAM 



'Mi SANDY 



i:^ GLACIATED LIMESTONE 



np UNGLACIATED LIMESTONE 



Figure 1. Distribution of the chief soil types in Wisconsin. The unglaciated 

 hmestone region of the southwest is practically devoid of lakes. In the granite 

 and sandy soils of the northern half of the state, the lakes are mostly soft water, 

 and there are many acid bogs. In the central and southeast portion of the state, 

 the lakes are basic (hard water). (Soil data from the Wisconsin Geological 

 and Natural History Survey. Base map courtesy of A. J. Nystrom and Co. ) 



19] 



