Dr. D. Woolacott—The Interglacial Problem. ate 
towards the south, so that they formed a Piedmont glacier. This 
composite ice-flow moved parallel to the coast of Northumberland 
and Durham! They also prove that this was the direction of the 
ice-streams before they began to retreat from North-Hast England. 
Along the coastal border of Northumberland and Durham.all the 
observed directions of the striations have this southerly trend. In 
Northumberland on the open west country they are from west to 
east, but along a coastal belt about 12 to 14 miles wide there is a 
distinct series all directed southwards. In one or two places a few 
miles inland, as at Burradon and South Charlton, there are two sets 
of striations, an earlier easterly and a later southerly.2 In Durham, 
owing to the more irregular contour of the eastern area, this belt is 
not so distinctly marked or has not yet been so clearly worked out, 
but the same orientation is clearly observable along the entire 
coastal region into North Yorkshire. 
STRIATIONS ALONG THE COASTAL BORDER OF NORTH-EAST 
ENGLAND.* 
Farne Islands : f 4 shld 
Budle Bay . ; : : : : . §8.H. and §.8.E. 
Swinhoet  . : : ‘ F : SSW 
Chathill i : : : ; -—S:S:H: 
Newton Sea Houses a mS 35° HE. and 8. 
South Charlton (two striations) : ate a 
later 5S. 
. : : + 4s earlier 8S. 17° E. 
Little Mill Quarries (two striations). later 46 Siw. 
Near mouth of Coquet . é : ; aceite 
Horsebridge Head (mouth of Wansbeck) . 5k 
earliest 56° N. of E. 
Burradon (three striations) | 20° S. of E. 
latest 44°S. of E. 
Kenton Quarries (near Newcastle) . : 5 tal, 
The Flatts, North Shields é : a 5 ase Bi. 
Roker, Sunderlandt ety: : : . WS.W. 
Fulwell Quarries . : P j : S. 
Salterfen Rocks (2 miles S. of Sunderland) 8S. 17° E. 
Haswell Quarry . é : é A Baier 
Wingate é : : 6 6 : Se LOR: 
Eaglescliffe : sees lillies : : . WS.W., S.W., and 
S.W. by W. 
Hob Hill, Saltburn : é 5 : . S.E. 
_* From records by Smythe, Trechmann, Kendall, Tate, Barrow, and myself. 
+ From an old unconfirmed record by Tate. 
+ Observed by Professor Kendall. It is more westerly than the rest of the 
striations round Sunderland, but the rock fragments found in the Grindon 
Kaim suggest that the ice was moving in this direction at one period in this 
area, e.g. fragments of Concretionary Magnesian Limestone occur in it west 
of the outcrop of that rock. 
At the end of this period of maximum glaciation in North-East 
England the combined Forth and Tweed—Cheviot ice was moving 
due south along the coastal border, the ice from the Lake District 
1 Smythe, op. jam cit., pp. 89-90. 
2 We as yet know nothing about either the Indicator boulders or the direction 
of the strix in the floor of the Preglacial ‘“‘ Sleekburn’’, ‘‘ Tyne’, or “ Tees”. 
