Vol. 69.] HAFSLO LAKE AND THE SOLVOKX VALLEif. 23 



halted here, and that we have a terminal moraine piled against the 

 rock which forms the eastern end of this section of the valley. 



The next hollow in the valley is that of the Hafslo Lake, which 

 has a length of 3 miles, from west to east, and a breadth of 1 mile, 

 from north to south. As I have said, the valley is now showing a 

 tendency to turn eastwards ; and in the mountains east of the lake 

 there is a valley in continuity with that of the lake crossing the 

 line of strike of the Silurian rocks and running out to the Lyster 

 Fjord at Solvorn. As I shall show, there has formerly been a 

 drainage from the lake in that direction ; but the present outlet 

 Is in the middle of the southern shore of the lake, from which 

 the water Hows into a line of depressions parallel with the Silurian 

 belt. (See the map, fig. 1, p. 20.) 



At the outlet of the Hafslo Lake the rock is augen-gneiss. 

 The road from Hillestad to Sogndal here crosses the river flowing 

 out of the lake, and the rock on the left side has been cut in making 

 the road ; but on the right one can see waterworn rock rising to 

 a considei'able height above the present water-level, probably 

 produced when the Hafslo Lake was filled by ice. 



The lake is 546 feet above the sea, and the river from it reaches 

 sea-level in less than 2 miles. The road follows the course of the 

 river (the Aaroj), and the scenery is very fine. The river flows 

 into a depression or hollow 2 miles long, named Barsnaes Fjord. 

 It then passes into an almost circular depression which forms the 

 topmost part of the Sogndals Fjord. At Sogndal we enter, through 

 a narrow opening, the main part of the same fjord, which passes 

 into the JNorums Fjord, and then into the Nordnses Sund opening 

 into the Sogne Fjord 4 miles east of Lekanger. This opening into 

 the Sogne Fjord is 14 miles from the Hafslo Lake, and the course 

 for that distance may be said (speaking generally) to lie along the 

 line of the Silurian belt ; though, for the most part, the erosive 

 agents have cut the valley down into th.e underlying gneiss. 



Having now dealt with the existing line of drainage from the 

 lake, I proceed to describe the disused line of drainage from the 

 lake to the Lyster Fjord, which crosses the line of the Silurian 

 belt at right angles ; although the valley from the lake to Solvorn 

 has been wholly cut down into the gneiss. 



Fig. 2 (p. 22) is a diagrammatic section from the lake to Solvorn. 1 

 The eastern side of the Hafslo Lake is formed by a rock-barrier, 

 in which there is a notch or col : this col is about 100 feet above 

 the lake, and at the head of the Solvorn Valley. The rock is much 

 rounded and iceworn, and if it be examined on the Solvorn side 

 ■evidence will be found that a river flowing from the lake has passed 

 over it. This is at the point where the Solvorn road leaves the 

 Hillestad-Sogndal road. 



1 Dr. Eeusch gives an ideal view of the locality in Nbrges Geol. Undersok. 

 No. 32 (1901) p. 147. 



