I92I. No. ir. THE STRANDFLAT AND ISOSTASV. 





from the eastern side of Smolen. (After photographs by P. Schei, July 11, 19041. 



various rocks according to Schetelig's map [1913;. The strandfiat is here 

 about 36 to 39 kilometres broad, from the foot of the Tusteren mountains 

 to the edge of the outer platform with skerries (see the map Fig. 107). 

 This profile demonstrates the remarkable evenness of this strandfiat, its 

 plane cutting horizontally through the geological formations, southwards 

 to the foot of the steep mountains. The depressions between the islands 

 north of Smolen, at Hvalpoi, Hammeroi, Inveien, &c., are drawn much 

 too deep in the profile (Fig. 108). These depressions are not deeper than 

 10 to 20 metres below sea-level, generally less. The same is also the case 

 south of Smolen, at Rosvolløi and Kuli Island. 



On the islands south of Smolen, built up of conglomerate-sandstone, 

 there are a few small hills rising above the plane: two hills to 44 and 

 78 metres (on Kuli), two hills to 39 and 47 metres on Edoi. and one hill 

 to 40 metres on each of the small islands Orten and Glasoi. 



Fig. 109 is a photograph taken by Mr. P. Schei in Juli 1904 from 

 Xelvikberg (67 metres high) on southeastern Smolen. It gives an illustra- 

 tive picture of the even surface of the strandfiat on Smolen. The' rocks 

 are here diorite and are rounded by glacial erosion. The flat plain of 

 northern Smolen is to a very great extent covered with peat-bogs. 



As our map Fig. 107 shows, Smolen is surrounded bv a submerged 

 strandfiat which is aI)out 12 kilometres broad at its broadest on the 

 southwestern and the northwestern sides of the island. The area of this 

 submerged strandfiat is considerably greater than that of the whole island. 



Our map gives the submerged strandfiat at levels less than 25 metres 

 below sea-level. Unfortunately lack of time has not allowed the writer 

 to flraw more detailed maps showing its surface topographv. It is 

 dissected by channels and depressions but not as much as the sub- 

 merged platforms to the southwest which were described above. Its 

 surface is more level than the surfaces of those, and in great parts it forms 

 extremely level horizontal planes, near present sea-level. Hundreds of 

 islands and rocks, rising above the .sea, are scattered almost over its whole 

 area, also near its outer edges. 



If in a detailed chart the isobaths be drawn for 10, 20, and 50 metres 

 of depth, it will be seen that the isobath for 20 metres has very compli- 

 cated shapes, it comes almost everywhere close to the isobath for 50 metres 

 near the outer edges of the platform, and even the isobath for 10 metres 

 comes very near them to a great extent. This indicates that the edge of 

 the submerged strandfiat is fairly sharply defined, and is in most places 



