Vol. 58.] THE GLACIATION OF TEESDALE, WEARDALE, ETC. 605 
valleys of Hisehope Burn and Horsleyhope Burn. The waters 
of Horsleyhope Lake stood at 1020 feet, and drained over the 
Derwent-Wear watershed at Lindisfarne, 13 miles east of Waskerley, 
and so into the drainage-basin of the River Wear. 
There are large fans of gravel, in some cases forming well- 
marked deltas, at the lower ends of all the overflow-valleys above 
mentioned. 
The relation of this series of lakes to each other will be readily 
seen by reference to fig. 9 a, p. 604, which is a section across the 
country approximately parallel to the margin of the glacier. As the 
South-Tyne Glacier dwindled, and the edge of the ice retreated north- 
ward, lower and lower outlets were successively opened for the 
waters of these lakes. The level of the water consequently fell 
step by step, until the normal channels of the rivers were once more 
exposed and the lakes completely drained (fig. 7, p. 600). Thus on 
the spur between West Allendale and East Allendale there is a dry 
gorge at 1260 feet. On the ice retreating from the 1250-foot line 
of this spur, the lakes of Hast and West Allen would become 
continuous. 
In the case of the ridge between East Allendale and Devil’s 
Water there is a large series of such channels, as follows (fig. 9 b):—at 
maximum glaciation, 1450 feet, then 1400, then Knight’s Cleugh 
1150 feet ; then 2 miles farther north a series of 1100 feet, 1080 feet, 
1050 feet; and finally one at 990 feet, 1 mile north of Catton. 
There is a still larger series on the high ground forming the water- 
shed to the east of Devil’s Water, at the following elevations: 
1200 feet, 1100 feet (several), 660 feet, (Strothersdale) 650 fect, 
600 feet, 580 feet, 560 feet, 540 feet, 530 feet; and finally an 
enormous gorge now almost’ dry, known as Dipton Burn, at 
450 feet. (See fig. 9c, p. 604.) 
These valleys are for the most part small, and would not appear 
to have carried the drainage of the lakes for any lengthened period. 
There are, however, some notable exceptions, as, for instance, 
Knight’s Cleugh, East Allendale to Devil’s Water, Strothersdale, 
and Dipton Burn. 
Farther eastward the country is intersected by numerous valleys 
of a type similar to those already described, but here the problem 
is complicated no doubt by the action of a glacier moving southward 
from the Cheviots after the period of maximum glaciation, and by 
the presence of the Scandinavian ice-sheet on the coast. I there- 
fore prefer to leave this portion of the district for the present, and 
to collect further details before venturing upon any explanation of 
its abnormal valleys. ; 
Before leaving the subject, however, mention must be made of a 
very large valley which cuts through the Derwent-Wear watershed, 
half-a-mile south of Consett Station. This is at a height of about 
700 feet, and connects the valley of the Derwent with that of the 
Browney, a tributary of the Wear. | 
Q.J3.G.8. No, 231. Zhe 
