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MAPS ILLUSTRATING REVOLUTIONS 



CHAP. XIV. 



Fig. 39. 



MAP OF THE BRITISH ISLES AND PART OF THE NORTHWEST 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 2000 feet, and of other 

 parts of the British Isles, 1300. 



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 evidence 

 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. 



