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NEW YORK STATE MUSEUM 



Port Stanley with Dundas, Devonic limestones occur at a consider- 

 able elevation above Lake Erie (Spencer). Hence the southwest- 

 ward continuation of the Dundas channel must be placed between. 



These maps are intended merely to illustrate the kind of drainage, which it 

 is believed existed in preglacial times in the Laurentian region. The ancient 

 consequent streams are probably correctly located; yet it must be stated 

 that the region between Hamilton and Port Stanley has not been sufficiently 

 explored to make the course indicated certain. These consequents may have 

 had a more indirect course, for if the country was worn down to peneplain- 

 condition, as appears to have been the case, these streams may have learned 



I- 



