POEMATION OF PENINSULAS. 



171 



towards the west is composed in reality of two unequal fragments, 

 due to the existence of a submarine reef which breaks the force of 



-Fig. 72. — Peninsula of Glens. 



the waves at a little distance from the strand. It is equallj^ to local 

 causes that we must attribute the inequality of thickness presented b}'' 

 the two ridges of the isthmus. Undoubtedly the eastern bank owes 



Thi-seillcof<Upt?i.fis tt 

 ii/ricjf UuiC- gfOui distunce 



Fig. 73.— Section across the peninsula of Giens. 



its greater solidity and height to the double action of the marine 

 current that tends from east to west, and of the mistral which blows 



