58 



HÅNS REUSCH. 



[No. 7. 



Stor Sylen is the kighest mountain of the Sylene group. The 

 upper part of this mass of mountain consists of dioritic rock, 

 the border of which with the underlying regional metamorphic 

 schist in one of the outer parts of the mountain group is as 

 indicated on fig. p. 32. On the top of Stor Sylen a phenomenon 

 of interest to glacial geology was observed. At the very highest 

 point a number of stones were found of different kind of rock 

 from the diorite of the mountain, they consisted of granulite 

 eye-gneiss, granite etc. These stones must have come from 

 Sweden. Now it is remarkable that Stor Sylen which obtains a 

 height of 1710 metres above the sea level is the very highest 

 point on this part of the Scandinavian mountain range. The 

 eastern slope of the pike is very steep, as far as the upper 

 most part is concerned alm ost perpendicular. In the glacial 

 period the ice must have moved from the low lying country in 

 Sweden over the mountainridge towards the Atlantic. Various 

 researchers De Geer, Hansen, Hørbye, Sveaonius have already 

 concluded from the glacial blocks that this had been the direction 

 of transport; but no foreign boulders have been found at such a 

 height before. The reason of the „ice-shed" being on the eastern 

 slope of the Scandinavian peninsula has been sought in the 

 supposed circumstance of the Atlantic having been open water 

 while the masses of ice eastwards spred themselves over Finland 

 and the Baltic. Under such circumstances the ice would have 

 been much more inclined to flow towards the Atlantic than east- 

 wards; consequently the ice-divide would come to lie further east 

 than one might expect. One must not conclude from a single 

 find like that before us that the old icecovering has been as 

 thick as here everywhere. On the coast near Bergen the author 

 has found that the top of Hornelen 906 m. o. s. 1. and of Tysnes- 

 saaten 722 m. o. s. 1. show no traces of glacial action while a 

 lower mountain Siggen 470 m. o. s. 1. had glacial markings on 

 the very top. In Jotunfjeldene, which lie further removed from 

 the coast, the highest peaks have stood out uncovered by the ice 

 which filled the valleys. Thus Stolenaastinden from about 1800 

 m. to 2040 m. o. s. 1. has never been iceclad. 



