148 !■ kil) I JOK nansi:n. M.-X. Kl« 



ihc waves, ami still tlurc is a strikinj,^ dif fcrciicc in the rJepths anrl even- 

 ness of llic surfaces of the suhiiier^«') plateaus aii'l their outer eHjifes, 

 which are so \vv\ sliarpU iiiarkc <1 111 tin- latter rej^ions. 'J'herc is thi.s 

 difference in llie situation that hetween I .ynj^j-vær in 66" 4' X. I>at. anrl 

 the h'tij^-elslx) Skerries ( kjij^elsboskjæraii ) in CiS" 3 1 ' X. J.at. the outer 

 C(»ast or edf^e of the now suhinerq-ed plateau has been almost continuous 

 (sec ^i^- 113). while the isolated 'l"ra-na I'laleau has been exposed to the 

 full fur\' of the sea almost on all sides, hut least on the nortlieastern side 

 where tlie cdye of the plateau is sliarpest. It nni^lil therefore he expected 

 that the effect of the wave erosion has been j^-reater on this plateau and 

 that especialh' all loose material has been more completely swept away, 

 while it may to some extent ha\e accumulated in the hollows anrl de- 

 pressions (jf the extensive ])lateau to the south. It is notewortliy that 

 the more isolated submerj^erl plateaus in the northeastern jiart of the ma]> 

 Fifi;'. I 13, at Slaj,,^grunnen and still more at I'loholman, have less horizontal 

 and more irrej^ular surfaces than the plateaus to the south anrl their depths 

 are _s4rcater. Tlicy resem])le the surface on the fuiter sirle of the Træna 

 riateau. The surface of the platform north of Skibatsvær in 66'Mo'N.Lat. 

 (see map Fi^-. 113) and at jonsg^runnan in 66" 12' N. Lat. (see map Fij^^. 

 114) is still more irregular. Outside Slaggrunnen the sea is less deep 

 and the bottom is also sloping less steeply seawards than along the edge 

 of the submerged ])latcau to tlie sf)uth (see Fig. 1131. This is also the 

 case outside Jonsgrunnan (see Fig. 1 14), but not outside Floholman 

 \vhere there is a fairly steep slope (see Fig. 113). 



It is, however, a striking fact that just the last mentioned regions at 

 Lyngvær, Slaggrunnen, and Floholman, where the submerged surface has 

 so great a resemblance to that of the southern part of Træna Plateau, are 

 also built up of granite, and so are Skibatsvær and Jonsgruiman [Rekstad, 

 19^5' PP- ^9 ^O- Tt is noteworthy that the submerged plateau west and 

 southwest of Lovund and Lovundvær has an irregular surface like that 

 of the w^estern side of the Træna Plateau. It is built up of comparativelv 

 resistant gneiss and partly of granite. The much rlissected plateaus of 

 Nesoi, Sornesøi, Lyngvær, and Mavær, east of Træma (Fig. 1 14, IX and X) 

 are built up of granite. 



On tlie otlicr liand, the most le\el submerged plateaus with the most 

 sharply defined outer edges, like those of Flovær and Lånan — and Sor- 

 vær to the east-soutlieast of tliem as well as the plateaus at Ytre Flesan 

 to tlie north — are built up of limestone, and so are the northern parts 

 of Vega and the plateau to tlie north of it (at Kilvær). The extremelv 

 level plateaus at Husvær and Sandvær, and at Hvsvær are built up of 

 mica-schist, and at Skjærvær of a kind of metamorphic tuff (see Fig. 115). 

 The plateaus to the soutli of the latter region, at Fuglvær and westwards 

 to Sjola and southwards to Steinan and Fngelsbo Skerries (see Fig. 113), 

 cire largely built up of granite, and so are Sola, the southern part of Vega, 



