232 Carl Fred. Kolderup. [Nr. 8 



The Granite-Zone and the Green-Schist-Zone 

 of Kraanipen. 



(Pages 104—106.) 



The green-schist-zone, which is the larger of the two zones, 

 ■extends from the farm Haugen in the south and northwards to 

 ■Osterøen. In the latter place the zone is less broad than on the 

 south side of Sørfjorden, and it is also here somewhat displaced in 

 an easterly direction. The rock is generally a very schistose green- 

 schist. A bluish-green hornblende is the main component; besides 

 this the rock consists of varying quautities of felspar and zoisite 

 and of small amounts of magnetite and pyrite. 



The rock of the granite-zone of Kraanipen is a pressed light- 

 coloured granite, which in several places contains numerous frag- 

 ments of green-schist. Veins from this granite-zone also penetrate 

 into the green-schist. By microscopical investigation it appears that 

 felspar (mainly consisting of plagioclase) and quartz are the chief 

 minerals of the rock. The other minerals are the following: zoisite 

 and epidote, biotite which is partly altered into chlorite, muscovite 

 and some ore. The structure of the rock may be seen in fig. 44. 



The granite is in several places intersected by veins of quartz, 

 and I have additionally found a dyke of granite consisting of a 

 greyish-white, iine-grained groundmass, in which are enclosed larger 

 black needles of hornblende, the length of which may attain 1 cm., 

 and crystals of garnet. By microscopical investigation the horn- 

 blende appears to be of the same common bluish-green type as that 

 found in the hornblende-schists and closely allied rocks of the area. 

 As may be seen in flg. 85, it has a poicilitic structure. The fel- 

 spar is mainly plagioclase, which is also the case with the felspar 

 in the granitic main rock of Kraanipen; we may therefore regard 

 the existence of a certain genetic relation between these rocks as 

 most probable. 



The Phyllite-Zone with Its Gneisses and Chloritic 



Rocks. 



(Pages 106—124.) 



The phyllites in the central part of the map show a somewhat 

 varying composition. The chief mass is ofgreyish colour. and con- 



