338 T. C. CHAMBERLIN 



Mississippi Valley, offer a highly promising line of inquiry in which 

 definite glacial-drainage stages may probably be traced into 

 physical connection with both the terrestrial and the marine 

 deposits of the more southerly regions. 



{d) The lowland and upland plains west of the Mississippi 

 offer a similarly promising connecting tract between the Keewatin 

 glacial fields and the Gulf coast. 



The combined import of careful co-ordinated studies on these 

 promising connective tracts between the fields of warmth and the 

 fields of cold should greatly help in revising and reconciling the 

 discordant interpretations so notably brought out — -so fortunately 

 brought out, shall we say, — by the singularly suggestive deposits 

 at Vero. 



