1 ig. 88. 1 h^' jtrandiîau cul in graniic nurih ol lananger. i-Scpl. i, igi i i. 



7 OLyrtjO/na^'t' JÙa^*"- 



I ^ 



.7ptr nu-rvci 



Il 122 mttrcs above sea-leveb north of Tananger harbour. i.Sept. i, igii 



Stance, very often continued horizontally without a break from regions 

 built up of very resistant rocks, like granites and gabbro, into regions 

 with weak schists (chlorite schists, phylüte, &c.). This is the case in the 

 regions of Bomlo Island, Karnitii, anrl Stavanger Peninsula. A difference 

 may be that in the regions of the more resistant rocks there are often more 

 and higher hills and mountains surmounting the plane of the strandfiat, 

 and the latter may not have as wide an extension there as in the regions 

 of weaker rocks. But even this is not always the case, c. g. on Bømlo Is- 

 land, and the height of the real plane of the strandfiat does not as a rule 

 differ. 



The onlv simple explanation of this striking feature seems to me 

 to be that although the principal processes for the lowering and sculpturing 

 of this coast have been the subaërial denudation and the glacial erosion, 

 the final levelling of the plane of the strandfiat has been accomplished by 

 the marine rlenudation. ;'. e. chiefly shore erosion by frost. After this plane 

 had been thus formed, there cannot have been any great amount of sub- 

 aerial denudation nor glacial erosion within the outer regions of the 

 strandfiat. for otherwise greater differences in the heights of th? plane 

 of the strandfiat would necessarily have been created, especially wh.ere the 

 power of resistance of the rocks differ much. On the otlicr hand the 

 strandfiat has been exposed to some glacial erosion, wliich has to some 

 extent broken the level surface of the strandfiat and made it less even 

 than it was originally. The effect of this glacial erosion has naturally 

 differed somewhat with the structure of the rocks and their power of 

 resistance. 



It has, however, to be considered that the power of resistance to shore 

 erosion and also to glacial erosion depends less on the hardness of the recks, 



