606 DE. J. E. MAKE AND MK. W. G. FEAENSIDES ON [Nov. I909, 



But Yarlside had its own ice. A large open combe occurs at its 

 eastern side, with a terminal moraine below. This combe has 

 receded by corrie-glacier erosion, cutting off the head of Little 

 Randy Gill, a tributary of Bowderdale. The ice flowing from 

 it, being prevented from flowing down the Backside Beck valley 

 by the Baugh Fell ice, has flowed north-eastwards along the old 

 beheaded Artlegarthdale, truncating the south-eastern slopes of 

 Kensgriff, depositing drift on the col between Backside and Wandale, 

 and carrying a train of boulders of Browgill Shales and red felsite 

 from the upper part of Backside over the col to the AVandale 

 Valley and onwards over the next col to Artlegarthdale. There, 

 being prevented from going farther by the ice which had come 

 from "Wild Boar Fell by way of the north side of Harter Fell and 

 filled the head of Raven stonedale, the drift was dumped down. 



There is one difficulty to notice. Below the hanging part of 

 Stoneley Gill at the top of Wandale is a combe facing southwards. 

 We would suggest that, as this lies athwart the general direction 

 of the later ice, it may be due to a local corrie-glacier at an early 

 of the Glacial Period. 



We come now to the streams of the Ravenstonedale drainage, and 

 shall follow them towards the west. 



Ellergill Sike runs in a shallow valley. The stream is 

 engaged in cutting through a deltoid mass of drift filling the valley- 

 bottom, like those masses which occur in the gills to the north of 

 Sedbergh and elsewhere. 



North-east of Ellergill Farm is an old quarry by the high road, 

 capped with drift and containing boulders of Carboniferous grit. 

 In this tract of comparative lowland the general direction of the 

 axes of the drumlins is east-north-east and west-south-west, whereas 

 farther north-west their axes trend more nearly south-east and 

 north-west. This points to the junction of the two ice-lobes (the 

 one from the Lake District and the other from the Wild Boar and 

 Baugh Fell region) in this part of the country. 



The foreign drift in Gaisgill, the head of Artlegarthdale, has 

 just been described. We may note the capture of the head waters 

 of Wyegarthdale by this stream, with the production of the col 

 (now occupied by drift) between Knoutsberry and The Knott on the 

 north side of it. The former head of Wyegarthdale now forms the 

 main tributary of Gaisgill, and enters that stream from the south 

 immediately opposite the col. Its capture was due to the more rapid 

 erosion of the Gaisgill stream, which runs over weak rocks along 

 the shatter-belt. The lower part of Artlegarthdale is markedly 

 U-shaped. 



Thackthwaite Gill, west of Artlegarthdale, is a U-shaped valley 

 with drift-filled bottom and presents no features of special interest. 

 Wyegarthgill valley also has a deltoid mass of drift filling the valley- 

 bottom ; the head of this drift-mass lies some distance below the head 

 of the valley. 



