240 Carl Fred. Kolderup. [Nr. 8 



of which has a schistose structure with intruding coarse-grained 

 dykes. Fig. 74 presents a vein-like fragment of fine-grained green- 

 schist in a normal-grained, partly streaked saussurite-gabbro. 



The Schistose Saussurite-Diabases on the Stretch 

 Langhelle — Fitjevand. 



(Pages 154 — 157.) 



This zone of various saussuritisized and schistic basic volcanic 

 rocks may best be studied in the euttings of the railroad along 

 Sørfjorden. On the cross-section Trengereid— Vaksdal (pl. II) these 

 rocks begin at XCIII west and terminate at XCVI east. As for 

 the description of this section I re f er to page 249. In the covered 

 area in the mountain there is no opportunity of detail-investigations. 

 Fig. 75 shows the microstructure of a tuff in the saussurite-diabase. 



The Labradorite-Rock-Area of Storenuten. 



(Pages 157—168.) 



This area consists chiefly of labradorite-rock ; especially in the 

 northern part, however, there occur a number of rocks which in 

 the Egersund-area and the Bergen-area generally accompany the 

 labradorite-rocks, namely mangerites, birkrcmites, norytes, gabbros 

 and the like. Some of them must be regarded as having come 

 fortn through eruptions of a later age than that of the labra- 

 dorite-rock; however, it is diflicult in the rather rugged and 

 covered field to make out the mutual relation of the rocks. From 

 the cross-section Trengereid Vaksdal, where the zones, here men- 

 tioned, have the numbers of XCVIII — CXIX we shall get an 

 impression of the manner in which these genetically connected 

 rocks alter with one another. The total length of the euttings 

 through the labradorite- and allied rocks along the railroad, is 1584 m. 

 Of these the labradorite-rocks occupy 891 m. in all, mangerite and 

 the like 271 m., quartz-gabbro and similar at least 139 m. (It is 

 impossible to state the breadth exactly because of the covered 

 terrain) ; furthermore there are small parts of birkremites, norytes, 

 a. s. o. The labroclorite-rock. which also occurs as inferior parts in 

 one of the mangerite-zones, is accordingly the predominant rock in 



