276 



MAPS ILLUSTRATING REVOLUTIONS CHAP. xiv. 



Fig. 39 



MAP OF THE BRITISH ISLES AND PAET OF THE NORTH- WEST OF EUROPE, 

 SHOWING THE GREAT AMOUNT OF SUPPOSED SUBMERGENCE OF LAND 

 BENEATH THE SEA DURING PART OF THE GLACIAL PERIOD. 



The submergence of Scotland is to the extent of 2,000 feet, and of 

 other parts of the British Isles, 1,300. 



In the map, the dark shade expresses the land which alone remained 

 above water. The area shaded by diagonal lines is that which cannot be 

 shown to have been under water at the period of floating ice by the evi 

 dence of erratics, or by marine shells of northern species. How far the 

 several parts of the submerged area were simultaneously or successively 

 laid under water, 'in the course of the glacial period, cannot, in the present 

 state of our knowledge, be determined. 



