Proc. Roch. Acad. Science. 



Vol, 5, Pl. X. 



a 



PRESENT LAKE 

 ONTARIO 



Map G. Present phase of Lake Ontario stage, disentangled from tlie work 

 of man and presented as a physiographic study of the sedimentation and 

 wave-work accomplished, or in progress, in Lake Ontario and its sub- 

 sidiaries. Especially conspicuous is the process of silting up of the Bay 

 from both ends in spite of rising water level. 



