596 



DK. J. E. MAKE, AND ME. "W. G. EEAKNSIDES ON [Nov. I909, 



Scarth, and that the diversion of its head waters has been due to the cutting- 

 back action of the head waters of the Carting Gill. A small dam would even 

 now be sufficient to turn the waters back to their old course. The date at wbich 

 the change took place is uncertain. The rocky ravine referred to is altogether 

 devoid of Drift, but this may merely be the result of the rapid erosion that is 

 taking place, and not necessarily a proof that the ravine is of post-Glacial 

 origin. It seems hardly likely that so deep a cut can have been made in solid 

 rock within the post-Glacial period.' 



Fig. 2. — The Carling Gill-Uldale diversions. 



Scale: 

 3 inches = 1 mile. 



[The broken line indicates the former drainage.] 



The accompanying diagrammatic plan (fig. 2) illustrates the 

 physical features here and our explanation of them. 



