LAMPLUGH: NOTES ON COAST BETWEEN BRIDLINGTON AND FILEY. 431 
main of stratified material, their position is scarcely explicable under 
any theory of submergence. The only probable supposition seems to 
me to be that they have been deposited along the edge of the ice- 
sheet, chiefly by its surface drainage, when the North Sea in this 
latitude was choked with a glacier which was thick enough to over- 
top the escarpment, though not to over-ride it. 
Note. — Permission to use the cliches of woodcuts from the 
Quarterly Journal, issued in illustration of these notes, was kindly 
granted by the Council of the Geological Society. 
