1 92 1. No. 1 1. 



THE STRAXDFLAT AND I50STASV. 



I olden 



outside Ålesund. 



further scutli; tlie rocks of tliis reqion are at anv rate not less resistant 

 to erosion than those further soutli. 



The natural explanation of the increasing development northwards 

 of the submerg-ed platforms of the strandfiat is in my opinion that in these 

 northern réglions the marine erosion, and especially the shore erosion by 

 frcist. has been much more favoured l)y severe climates than further south. 

 Hence, the (|uant!ty of rock cut away bv shore erosion during" past ag'es 

 much increases northwards with increasing- latitude. 



There is also the likelihood that in these northern regions the climates 

 liave. pro])ablv always, been more stormy than farther south. As I have 

 pointed out before, the transporting and erosive capacity of the waves 

 increases with something bewecn the third and sixth power of the velocity 

 of the wind. Along a coast like this, exposed to the full power of the sea, 

 this may also be of much importance for the marine denudation. 



The severer climates of the northern regions may also increase the 

 subaërial denudation, but not sufficiently to explain the striking difference 

 in the development of the strandfiat and its submerged platforms. It is 

 a striking fact that in these northern regions the submerged parts of the 

 strandfiat have considerable areas as compared with those of its emerged 

 parts. 



In the region of Hiistad there is a conspicuous level strandfiat ex- 

 tending over the low skerries outside the coast, as well as over the outer 

 border of the mainland, where the steep, often precipitous mountain sides 



Fis. loo. .Strandtlat in Bortcund Fjord, iiiskIc Alc;>und. 



