102 Fl<l\>l\]Oy NANSKN. M.-X. Kl. 



rfsull is lliat i1k\ liavc been more or less lowered, so that their rlepths 

 lia\c hccii imicli iiicrcascfl, llicir surfaces have become more or less 

 (iiit\\anl-sl()|jin,L;, and tluir outer clj^-e has been rounflerl off anrl is less 

 sliarpK marked. As was pointcil out abo\c, it is, however, stran/:(e that 

 the glacial erosion has not sculjjlured deejjer valle\s and channels on this 

 platform, similar to those that occur on land. 



As has been pointed out b\- Idi. X'o^^t^ some mou^tai^^ and nîountain 

 ridg'es on Moskenesoi li<a\c' flat to])s formed by the initial, Palæic surface 

 of the land, which still exists more or less intact, extending with its 

 undulating level surface to the very sharply defined edges over the pre- 

 cipitous side walls of the many cir([ue \alleys. 



This prox'es that in this region during the period when these valleys 

 were finally formed, the effect of the subaërial denudation lias been very 

 insignificant as compared to that of the erosion of the cirque glaciers, 

 which works to some extent in a manner similar to the shore erosion by 

 frost, cutting back the sides of the cirque valleys into the mountain block 

 with the initial fairly flat surface on top. The sharp edges between this 

 surface and the mountain walls have thus arisen. 



Along the south-eastern coasts of r\'st-l\:goi and Öst-J'ügoi (north- 

 east of Moskenesoi) and the south coast of Ilinnoi, bounding A'est Fjord 

 to the north-west, there is a distinctly developed, although narrow strand- 

 flat, consisting to a large extent of a platform with numerous small is- 

 lands and skerries at the foot of the steep mountains (see Figs, i and 2). 

 The surface of the submerged platform between the emerged islands and 

 skerries is uneven and irregular with depths varying between 10 and 50 

 metres or even more, as they might be expected to be where the platform 

 has been much exposed to glacial erosion. 



The rocks of this region are gabbros and granites. 



Along the outer, north-western coast of Flagstadai, Vcst-Vågøi, 

 Grijiisoi, and Ost-Vågoi there is a narrow submerged platform. In some 

 places, c. g. north of Flagstadoi, it is flat and fairly even, at depths of 

 about 12 to 16 metres below sea-level, having a fairly well marked edge 

 at this level up to 7 kilometres from the coast. In other places it is more 

 irregular. North of Grimsoi there is a 5 kilometres broad and very even 

 platform with depths less than 10 metres, to a large extent between i and 

 6 metres below sea-level. To Avhat extent these plateaus are levelled by 

 recent sediment cannot be decided. 



Along the outer coast of Vesterålen, further north, there is an ir- 

 regular submerged platform similar to that along the outer coast of 

 Lofoten. The islands of this region are likewise built up of gabbros, mon- 

 zonites, and granites. There is also a well-marked emerged strandfiat 

 along the coasts of the islands [cf. Th. \ ogt; 19 10, photographs Pis. II 

 and III]. 



