POLK AND NORMAN COUNTIES, 1899. J. B. TODD. 



morainic confusion and increased accumulation, accompanied by powerful drainage 

 which gave rise to glacial streams that must have taken their courses toward the 

 south, through the moraines that had previously been accumulated. 



This is not the proper place to present the reasons for this hypothesis, but to 

 the writer it appears to be supported by facts which have been brought to light in 

 the eastern part of the state, later than Mr. Upham's principal study, and by consid- 

 erations that have been mentioned already in this atlas (Plates XLVII and XLVIII). 

 It is apparent that, if this hypothesis be correct, it will affect materially the inter- 

 pretation of the morainic belts, and their assignment to this or that of the great 

 ice-lobes. 



These counties, although containing much flat, swampy land, yet embrace 

 much that is dry and suitable, without drainage, to farming, and possess a fertile, 

 deep soil. N. H. w. 



