58 



gorge. Two or three sharp embayments occur here, one 

 north and another south of Hubbard point and a smaller 

 one on the east side. There was probably a small and rela- 

 tively narrow pre-glacial valley or trench at this place 

 which formed the col between the head of Spencer's 

 Falls-Chippawa buried valley and a smaller valley des- 

 cending gently northward to the whirlpool. This narrow 

 little valley may have had windings which guided the falls 

 in such a way as to produce the embayments now seen. 



The Whirlpool rapids and narrow, shallow gorge, looking south (up stream) from near 

 .."Whirlpool point; the railway bridges in the distance. This view looks into the 

 mouth of the narrow gorge. The wider part in the foreground is a part of 

 the Eddy basin. The widening to the right beyond the edge of the pic- 

 ture is more pronounced than that shown in the middle foreground. 



This section of the gorge also shows to best advantage the 

 slight alternate contractions and expansions which seem 

 to record a rythmical tendency in the recession of the falls. 



Gorge of the Whirlpool Rapids. — At the cantilever 

 railway bridge one sees the head of the Whirlpool rapids. 

 The sudden sharp contraction of the top width of the gorge 

 is well shown at this point, the narrow section to the north 



