Struthcra $ Co. 



Fig. 104.— Map of the Niagara River below the falls, showing the buried channel 

 from the whirlpool to St. Davids. Small streams, a, b, c, fall into the main 

 gorge over a rocky escarpment. No rock appears in the channel at d, but the 

 rocky escarpment reappears at e. 



