I92I. No. II. THE STR.WDFLAT AND ISOSTASY, 





Fig. 94. South-eastern part of tlie Lister Land, from Einarsnos north-westwards towards the valley of Fram- 

 waren, inside Helvig Fjord. View taken from the sea near Asegrund west of Svaneflii. Ijuly 25, 191 1 1. 



nevcrtlieles.s I see no reason wliv the low rocky levels should not be parts 

 of a strandfiat of the same nature as the one we have found extendinj^" all 

 along- tlie coast to the northwest and north. 



The mountainous land insifle the low land of Lister has a fairly level 

 surface at about 200 metres or more above the sea, rising- in Ravncheien 

 to 350 and 366 metres (see Fig. 94) . 



Between Lister and The Naze (Lindesnes) and along the coast further 

 eastwarfls where the rocks arc ])artly gabbro or labradorite (between Far- 

 sunrl and The Naze) and partly Archæan, there are a great many low rocky 

 islands anrl skerries indicating distinctly the lower level of a strandfiat, 

 and to some extent perhaps two levels. 



The promontory of the Naze itself (consisting of Archæan rocks) 

 belongs to the strandfiat and exhibits two marked levels, a general liigher 

 level at about 16 to 18 metres above the sea. and another very low level 

 at the outer point, only a few metres above the sea (Fig. 95). The level 

 of about 16 to 20 metres was also observed further east, c. g. at Kje- 

 holmen and Kalvehaue on Imsa Island at Spangereid (Fig. 96). 



The Southern and South-eastern Coast of Norway. 



Along the southern coast of Norway, between Mandai and Christiania 

 Fjord, there is a Ijorder of numerous islets, skerries, and rocks, but there 

 are comparatively few perfectly certain indications of a strandfiat. Ahl- 

 mann goes, however, decidedly too far when he asserts [1919, p. 36] that 

 "there is no sign whatever of marine abrasion or the presence of any 

 marine coastal plain". 



Where the general land surface is low and slopes gradually towards 

 the coast, as it does in this region, it is very often difficult to decide 

 where there is a coastal plain or strandfiat cut by shore-erosion, and 

 where it is only the general low level of the land surface that slopes gently 

 into the sea. It seems to me, however, that a plane so nearly perfectly 

 horizontal as is exhibited by many series of islands along this coast (see 

 for instance Fig. 97 and especially l*"ig. 98) cannot have been formed solely 

 by subaërial denudation and glacial erosion, but it must have been finally 

 levelled by shore-erosion, in the manner I have previously described. 

 Sometimes one mav observe a distinct break between the horizontal level 

 of this narrow stranrlflat ami the slope of the higher land inside. The 



