1914 — 15] Fjeldbygningen mellem Sørfjorden og Samnangerf jorden. 245 



The Cross-Section Trengereid — Vaksdal. 



(Pages 174—199.) 



In order to get a general view of the geological conditions 

 in Samnanger-area, I had my assistent, Olav Melkild, take a de- 

 tailed cross-section along the railroad, from the tunnel at the farm 

 of Risnes to the west (1147 meters west of Trengereid station) to the 

 bridge over the river at Vaksdal to the east. We have here an 

 extraordinary opportunity of studying the strongly compressed series 

 of rocks and their relation to one another. The section has re- 

 peatedly been revised by me. It is reproduced on plate II. 



At the tunnel of Risnes, situated at the commencement of the 

 section, we tind a grey gneiss with segregations rich in amphibole, 

 and with large reddish coarse-grained lenses of granite. A long 

 lens of quartz, designated as I, occurs in this gneiss. 



II a and II b are gneissose rocks. 



III. Chloritisized phyllites reminding one of mica-schists, and 

 partly garnet-bearing. Smaller lenses of quartz and brownish 

 weathered calcite. Dip 65° E. 



IV. Hornblende-schist. 



V. Light-coloured gneiss. 



VI. Gneiss, actually a mere variety of the previous one. 

 Dip 75° E. (Analysis p. 41.) 



VII. Strongly pressed conglomerate, which at the first view 

 looks like hornblende-schist. The ground-mass is zoisite-hornblende- 

 schist. A lens of blue-quartz and a dyke about 0,5 m. broad 

 occur here. Dip 85° E. 



VIII. Striped hornblende-bearing granitic rock with single 

 small brownish-red garnets. Dip 90°. 



IX. Moberg-conglomerate(?) with some larger lenses of quartz; 

 in the middle a distinct anticline. 



X. Faintly striped greyish dyke of hornblende-bearing granite. 

 Dip 90°. 



XI. Moberg-conglomerate. 



XII. Reddish marble with greenish bands. 



XIII. Moberg-conglomerate. 



XIV. Quartz-sericite-schist. Dip 90°. 



XV. Variegated marble. Dip 80° E. S. E. 



XVI. Moberg-conglomerate with small pebbles. 



