CHAPTER XIII 



SOME SUGGESTIONS FOR FUTURE STUDY 



Detailed studies such as those carried on at Toronto and in the Chicago 

 basin, should be conducted in all favorable localities once covered by post- 

 glacial waters. The correlation of the results of such investigations will go 

 far toward clearing up many uncertainties which now surround the interpreta- 

 tion of certain biotic phenomena, especially relating to the early stages of the 

 ponded waters. A number of typical localities have been studied critically 

 stratigraphically, and maps and other data are available as guides. The more 

 notable of these areas may be briefly considered. 



GLACIAL LAKE AGASSIZ 



This immense lake built up several shore lines in which a few evidences of 

 life have been found (see page 164). The outlet thru Traverse and Big Stone 

 lakes, as well as protected bays and shallow water regions, should contain 

 deposits which might reveal something of the biotic history of the lake. Both 

 in northern Minnesota and in Manitoba favorable localities undoubtedly occur. 

 It is believed that sheltered spots on Beltrami Island of Lake Agassiz (now the 

 Red Lake Indian Reservation) may have preserved some of the life of the lake 

 in deposits formed during its different stages. Warren Upham's monograph. 

 "The Glacial Lake Agassiz "is an indispensable aid in conducting investigations 

 on the shores of this ancient lake. The county maps in the Final Reports of 

 the Geological and Natural History Survey of Minnesota, especially volume 

 IV, will be found very helpful in this work. 



LAKE MAUMEE 



The Wabash River, like the Desplaines in Illinois, served as an outlet for 

 the first postglacial lake in Ohio and Indiana, Lake Maumee. The city of 

 Fort Wayne is built upon a portion of the ancient outlet, much as are certain 

 portions of Chicago's western suburban towns built on the ancient outlet of 

 Lake Chicago. Studies in the sedimentary deposits left by the lake in this area 

 would most likely be productive of results similar to those obtained in the 

 Chicago region. During the Lake Maumee stage, the life, which had been 

 crowded south of the ice sheet, undoubtedly migrated northward and occupied 

 sheltered and shallow parts of this body of water, in the same manner as did 

 the Chicago biota. It is perhaps not unwarranted to predict that a fauna of 



