ig2I. No. TI. THE STRAXDFI.AT AXn ISOSTASY. 73 



A level and well developed strandfiat extends along the eastern side 

 of Lygre Fjord over the many islands, Risoi, Lauoi, Dragoi, Bragøi. 

 Spjotoi, &c. and along the whole of the Lindås Peninsula (Fig. 48). The 

 rock is Ulriken gneiss in this region. 



There is also a well developed strandfiat on the land on the western 

 side of Lygre Fjord, on the Lygre Islands (Fig. 21, no. 57), and on the 

 peninsula to the south of them (Fig. 49). The level plane is sharply de- 

 fined against the steeply ascending hills on the southern portion of 

 Radoi behind. 



The general height of the extremely level strandfiat in the whole of 

 this region, on both sides of Lygre Fjord and northwards towards Kjel- 

 gaulen, seems to be between 20 and 2^ metres above the sea, but possibly 

 rises slightlv westwards towards the sea. 



The Region of Radøi. 



The conspicuously level strandfiat of the northern Lindås peninsula 

 is continued westwards over the islands Bakoi and Fosenoi (Fig. 21, 

 '"■o- SZ — 56), and southwestwards over Radoi (Fig. 21, no. 58) which is on 

 the whole very flat, especially in its northwestern part. Fig. 50 is a view 

 of the northwestern end of Radt)i with the many small islets outside and 

 Fosenoi to the north, taken from the sea southeast of Feie Island (Fig. 21, 

 no. 59). The height of this outer, very flat land I estimate to be about 

 17 metres above the sea, or very much the same as that of northwestern 

 Lindås Peninsula. Small hills rise here and there above the plane of the 

 strandfiat, but this is much more frequent in the southeastern part of Radoi. 



Seawards outside Hjelte Fjord and Fed je Fjord (Fig. 21, no. 65, 66) 

 there is a series of low islands: Feie, Sulen, Staksøi, Hennoi, Lyngøi, 

 Forhjelmen, Sæloi, Alvoi, &c., forming the so-called Öigaren. Seen at a 

 distance the surface of this series of islands exhibits an almost uniform 

 horizontal level or strandfiat at about the same height as that of the 

 land inside. 



The lighthouse of Helliso, at the southwestern end of Feie, is situated 

 on a rock-surface 17 metres above the sea, which is very nearlv level with 

 the general surface of that island, to judge from what I saw from the sea. 

 Here and there more or less isolated hills rise above the plane of this 

 strandfiat, c. g. Hesten and Feieb Jörnen on Feie, Sælstakken (59 metres), 

 and Asdolcn (49 metres) on S.'eloi. On the islands Bredviksoi and Blomøi 

 to the south there arc also a few hills rising to 51 and 52 metres above 

 the sea, and one hill on Blomoi even to 70 metres. 



It is noteworthy that these outer series of islanrls have such a very 

 sharply defined strand flat in very nearly the same level as Radoi inside 

 of Fedje Fjord and Hjelte Fjord although they are built up of Archæan 



