Proc. Roc'h. AcAt). Science 



Vol. 5, Pl. VIII. 



I RONDEQUOIT 

 MEADOWS. 



Map E. Gilbert Gulf stage. The ice has left the Saint Lawrence Valley 

 with the Thousand Islands depressed below sea level so that marine 

 waters occupy the Ontario basin, — their shore line being several miles 

 beyond our map limit. Lake Irondequoit is silted up into a meadow, 

 the present flat floor of the middle Bay. south of which meanders develop. 



