322 E. C. ANDREWS. 



(6) Increased velocity implies corrasive action rising in 

 a high geometrical ratio. 



(7) From the foregoing the profiles of all stream channels 

 formed individually by one stream type only should there- 

 fore be similar in general appearance. 



(8) The forms developed by the general stream have been 

 worked out by means of these principles (see Part I). 



(9) But the forms deduced for the general stream are 

 matched in nature in the case of the ordinary water stream 

 (which has been definitely observed moreover to have 

 formed its own channel profiles). 



(10) Therefore any group of such similarly shaped, 

 similarly situated, and similarly associated profiles as those 

 deduced for the general stream can be satisfactorily 

 explained by stream action. 



(11) But such groups of forms occur in regions of 

 recent glaciation. 



(12) They can be satisfactorily explained therefore by 

 stream action. 



(13) Moreover glaciers themselves are streams. 



(14) Glaciers in recent times occupied the same general 

 relations (as to size, surface and so on) to cirques, lake- 

 basins, over deepened valleys, and other associated forms 

 which the general stream type has been deduced to occupy 

 with regard to its own channel forms. 



(15) With the exception of a glacier no other stream in 

 these glaciated regions is known which had the power to 

 fashion the typical cirque, rock basin and spur "facet." 



(16) Glaciers therefore, in all probability, formed the 

 typical cirques, the fiord and Alpine basins, the spurless 

 chasms of Alpine regions, as also the hanging valleys and 

 the " steps" and "treads" in Alpine valleys. 



