42 IKIDIJOF N'ANSKN. M.-X. Kl. 



Oli the (jtlicr liaiid, tlic waves will lia\e a f^realer erosive force on 

 exposed coasts. P)Ut as the \\a\e erosion wiii attack a vertically more 

 extended surface of the sliore cliff than does the shore erosion by frost, 

 it will not cut a sharply markerl incision in the mountain side, as has been 

 pointed out by T. Vogt [19 17]. 



Thus we may have an exf^lanation why raiscl beaches are less con- 

 spicuous and seldom observed along the open coasts of Norway, while they 

 are often very conspicuous in the fjords and sheltered sounds, especially 

 in northern Norway, where the climatic conditions have been favourable 

 for tlieir formation. The lower salinity of the surface layers of the sea 

 in the fjords and sounds may also have been of some importance in this 

 respect. 



A striking difference between the strandfiat and the lerlges of the 

 raised beaches, besides the difference of extension and width, is that the 

 latter are tilted, having always a dip seawards, while the plane of the 

 strandfiat is very nearly horizontal. It is obvious that the strandfiat is 

 a formation that has been developed during long periods when the shore- 

 line was standing at a very nearly stable level, while the ledges of the 

 raised beaches have been formed during relatively short periods when the 

 shore-line had only temporary levels. 



