KENDALL : THE GLACIATION OF YORKSHIRE. 
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as that suggested by Mr. Lamplugh, and I trust I shall escape the 
imputation of presumption in venturing to dissent from the opinion 
of so high authority, if I point out that, though I cannot claim a 
minute knowledge of the drift-beds of the Yorkshire coast such as 
Mr. Lamplugh possesses, I have paid a good deal of attention to the 
glacial phenomena of Northumberland, Durham, and the inland 
districts of Yorkshire, besides possessing a rather more than cursory 
acquaintance with the coast, 
I incline to the opinion that at the first onset of the Scandi- 
navian ice the Teesdale glacier had already made its wav to 
the sea, and the comparative rarity of rocks from Teesdale in 
the Basement Clay may have been due to the fact that the 
Norse sheet at first bore straight on to our coast and thus ice 
coming to Holderness would not have crossed the path of the 
Shap stream. When the obstruction of our bold cliffs was encoun- 
tered the foreign ice would pile up and thicken and gradually 
adopt a new course, which, since there were no native glaciers to be 
encountered to the south of the Tees, would be mainly southerly. 
Some of the Shap blocks which lay off the mouth of the Tees would 
now be involved in the ground moraine of the ice-sheet and carried 
with it, at an excessively slow rate, and laid down at intervals along 
the coast upon the Basement Bed. There is an area, known as the 
Rough Ground, a few miles from the mouth of the Tees, from 
which many boulders, some of Shap granite, are dredged from time 
to time by the trawlers, and this I regard, in common with the late 
Professor Carvill Lewis, as the site of the terminal moraine of the 
Stainmoor glacier. It might be objected that this terminal moraine 
would be entirely obliterated by the movement of other ice over it, 
but I would point out that the scour of marine currents may be 
continually exposing the boulders of a moraine that had been simply 
levelled. It is very improbable that on a low slope the terminal 
moraine of a great glacier could be wholly destroyed and all its 
materials carried away, especially by ice flowing along its length. 
Now to consider the York branch of the Stainmoor stream. The 
same cause that obstructed the mouth of the Tees would oppose front 
to front the glacier which debouched there. Some piling up would 
