e 
582 MR. A. R. DWERRYHOUSE ON THE GLACIATION oF [ Aug. 1902, 
retained a characteristically glaciated outline in many parts of the 
district, roches moutonnées being abundant. 
The following is a list of the striated surfaces which I have 
observed in the district, with the mean direction of the striations ;— 
1, Surface of basalt, at the junction of Green Burn with the Tees (1663 
feet). S. 55° to 87° HB. (38). 
. Surface of basalt, in Bothermeer Sike (1625 feet). §. 75° to 88° E. (34). 
. Surface of Carboniferous Limestone, in Sand Sike (1500 feet). 
18° IN (8). 
4. Surface of basalt, at Crag Nook (1500 feet). S. 380° E. (36). 
D. Sun ieee) of basalt, in Harwood Beck, opposite Peghorn Lodge. (1300 feet). 
Sab72 HE 
6. Surface of basalt, in the bed of the Tees, opposite Cronkley Green 
(1200 feet). S. 60° H. 
1 neal surfaces of basalt, at Dufton Moss, Forest (1200 feet). §.65° E., 
§. 602 HS. 63° ES. 68> E. (37): 
8. Two surfaces of basalt, at Holwick Head (1100 feet), 8. 57° H., and 
S. 68° E. (38). 
9. Sur face of basalt, at Rotton Rigg (1150 feet). 8. 63° E. (39). 
10. Surface of Millstone Grit, half-a-mile north of Hollingside Wood. 
E. 3° to 5° S. (40). 
11. Surface of Coal-Measure sandstone, a quarter of a mile north-west of 
Hawksley-Hill House. N. 60° E. (41), 
12. Surface of Coal-Measure sandstone, on Roger Moor (1000 feet). 
N.75° E. (42). 
13. Surface of Coal-Measure sandstone, at Stainton. N.75° to 80° E. (48). 
The foregoing directions have been corrected for magnetic de- 
clination. 
(4) Boundaries of the Ice at the Period of Maximum 
Glaciation. 
The glacier which filled the upper part of Teesdale during the 
Glacial Period took its rise in the semicircle of hills at the head 
of the Dale, at an elevation of about 2000 feet above the present 
level of the sea. The ice flowing from this reservoir of névé soon 
divided into three branches. The main branch flowed down Tees- 
dale. The next in magnitude found its way across a part of Yad 
Moss and down the Harwood Valley, eventually joining the ice 
which flowed down Teesdale. proper near the point where the 
Tees now receives the waters of Harwood Beck. The third branch 
flowed down the Valley of the South Tyne towards Alston, the 
further course of this branch being described in §$ IV, p. 601. 
That ice flowed down the upper part of the Valley of the Tees is 
proved by the occurrence of glacial striz at the junction of Green 
Burn with the Tees. ‘These: oni will he seen, on reference to 
river. The next set of striae W hich occur in this part of the valley 
are in the bed of Bothermeer Sike, and point almost directly across 
the course of the river, towards its left bank. 
When the glacier reached the narrow part of the valley below 
Cauldron Snout, the gorge being too small to take the whole flow, 
the ice became ponded-up to such an extent that it overflowed the 
