216 Carl Fred. Kolclerup. [Nr. 8 



quartz-sandstone, chloritic sparagmite, polygenetic conglomerate, 

 several sorts of gneiss, and zoisite- hornblende-schist, 



Tn the inner arcli whieh, as already mentioned, extends from 

 Nordaasvand to Bergen and farther towards the north to Askø, 

 marble is much rarer, and at the same time more crystalline, thus 

 excluding every hope of fossils being found; the phyllite has also 

 been so strongly metamorphosed that it almost passes into mica-schist; 

 besides these rocks we tind zoisite-hornblende-schist, quartzite-schist 

 — in which occasionally remains of crushed pebbles have been 

 found, mdicating old quartz-conglomerate — together with gneiss 

 of a different character to that found in the outer arch. 



Between these two Silurian arches we have a gneiss-zone, 

 marked on the map by larger and heavier lines, the geological age 

 of which is quite uncertain. Dr. Reusch named this zone „the 

 gneiss area of Ulrikken", after Mount Ulrikken close to Bergen. 

 It is a neutral term which I have made use of previously. 



It is possible that a clearer apprehension of the gneiss-zone of 

 Ulrikken might be gained by a more detailed mapping, thus affor- 

 ding a possibility of deciding its age, but the topographical maps 

 are unfortunately so insufticient that it is out of the question to 

 undertake such detailed geological mapping at present. On my 

 numerous excursions in this district I have come to the conclusion 

 that micaceous gneisses, partly injection-gneisses, intercalated with 

 reddish, streaked granites, form the main mass. As may be seen 

 by the map, this district contains some labradorite-rocks, mange- 

 rites, and similar younger rocks suggesting the sparagmite division 

 of the Norwegian mountains with the younger igneous rocks occur- 

 ring in it; I tind, however, no absolute necessity for supposing such 

 a relation. An Archæan gneiss pressed up between the Silurian 

 arches would probably assume the same appearance, and develop 

 a similar strongly marked schistose character, and it is but natural 

 that the magma, too, would be pressed up into the longitudinal 

 flssures and cavities. 



The igneous rocks which are marked with distinctive terms on 

 the map are considered as younger igneous rocks, these being labra- 

 dorite-rocks, mangerites, serpentines, saussurite-gabbros and younger 

 granites, and there are also some smaller masses of quartz-mange- 

 rites, etc, which it was impossibfe to mark on a map of so small 

 scale. As I have tried to prove in my work, "Die Labradorfelse 



