158 MAN AND THE GLACIAL PERIOD. 



reviewed, from Tynemouth to Bridlington, wherever the 

 ice came on to the land from the seaward, it brought in 

 shells and fragmentary patches of the sea-bottom in- 

 volved in its ground moraine. Space does not permit of 

 a detailed description of the several members of the York- 

 shire Drift, and I pass on to deal in a general way with 

 the glacial phenomena of the eastern side of Eng- 

 land. 



" The East Anglian Glacier. — The influence of the 

 Scandinavian ice is clearly seen in the fact that the entire 

 ice-movement down the east coast south of Bridlington 

 was all from the seaward. Clays, sands, and gravels, the 

 products of a continuous mass of land-ice coming from 

 the northeast are spread over the whole country, from the 

 Trent to the high grounds on the north of London over- 

 looking the Thames. 



" The line of extreme extension of these drift-deposits 

 runs from Finchley (near London), in the south across 

 Hertfordshire, through Cambridgeshire, with outlying 

 patches at Gogmagog and near Buckingham, and north- 

 westward over a large portion of Leicestershire into the 

 upper waters of the Trent, embracing the elevated region 

 of Palaeozoic rocks at Charnwood Forest, near Leices- 

 ter. 



" Eeserving the consideration of the very involved ques- 

 tions connected with the drifts of the upper part of the 

 Trent Valley, I may pass on to join the phenomena of the 

 southeastern counties with those at Flamborough Head. 

 From Nottinghamshire the limits of the drift of the East 

 Anglian Glacier seem to run in a direction nearly due 

 west to east, for the great oolitic escarpment upon which 

 Lincoln Cathedral is built is absolutely driftless to the 

 northward of the breach about Sleaford. However, along 

 the western flank of the oolitic range true boulder-clay 

 occurs, bordering and doubtless underlying the great fen- 

 tract of mid-Lincolnshire ; and the great Lincolnshire 



