446 



ME. BERNARD SiTITH ON THE 



[Sept. TQli, 



wbicli, v^hen it had dwindled to a mere snow- slope, left a small 

 moraine 250 yards from the screes at the head of the combe. 



This moraine formerl}* held up a small lake, which finally drained 

 away through a breach. A similar small lake-site, with a breached 

 moraine below it, may be seen below the crags at the head of 

 Stoupdale Beck. 



XII. Hanging Valleys. 



Glaciation of this area has given rise to discordance in grade 

 between some of the main and tributary valleys. On the western 

 slope of Black Combe all the small valleys are hanging. The upper 

 parts of the streams are gently graded ; but, when they reach the 



Pig. 18. — The Black Combe hanging valley and corrie, 

 looking westwards. 





oversteepened slope of the mountain, they occupy narrow post- 

 Glacial gorges, down which they cascade to the level of the drift- 

 plain. 



Black Combe, drained by Blackcorabe Beck, hangs 200 feet above 

 the valley of AYhitecombe Beck (fig. 18, above). 



The floor of the Whicham Valley and the mouths of most of its 

 tributaries being drift-filled, it is difficult to say whether the rock- 

 floors are at accordant grade with tbe main floor : this much, how- 

 ever, is certain— with the removal of drift from the lower parts of 

 the tributary-valleys there is great activity near the headwaters. 

 In Stoupdale Beck, about half a mile west of Baystone Reservoir, 

 for example, there are some small, but very neat, incised meanders 

 cut in grey slate. 



XIII. General Conclusions. 



(i) With the exception of the coastal drift-plain, the main 

 features of the district had been developed before the advent of the 

 Ice Age. 



(ii) At the period of maximum glaciation, the Black Combe 



