I92I. No. 8. ON THE ECLOflÎTES OF NORWAY. 67 



i-ocks are genetically connected with one another, even in such cases 

 where they form separate inclusions or intrusions in the gneiss. I shall 

 describe a few examples. 



Solvbergknausen, Dalsfjord, Sondmore. Near Stensvik at 

 Dalsijord labradorite-rock covers a rather large area on the mountain slope, 

 hi a section visible in Solvbergknausen near Omelfot (fig. 9) it appears as 

 sheet-shaped masses in an inclined position parallel to the strike of the sur- 

 rounding gneiss, hi fig. 9 only the lowest sheets of a larger series are 

 visible; other much thicker masses ot labradorite-rock follow upwards. 



Beneath the labradorite-rock follows a thinner sheet of eclogite, largely 

 amphibolitized and, in turn, underlain by sheets of dunite and saxonite, 

 bounded by the gneiss. 



At the contact the labradorite-rock passes o\er into (amphibolitizedl 

 eclogite in such a way that its mafic minerals, to which is added garnet, 

 become gradually more copious and cluster into enclosed lumps. The 

 labradorite-rock is distinctly younger and the mixed rock, at the contact, 

 has often developed as an eruptive breccia. The whole appearance has 

 much resemblance to the relations of eclogite and labradorite-rock in the 

 Bergen region. 



Near Ekremsaeter, Al m k 1 o vd al en, a sheet, or sill, of labra- 

 dorite-rock (p. 23) begins from the border of the large body of oli vine- 

 rock and stretches eastward in the gneiss-area parallel to its strike. On its 

 north side this mass is bounded by numerous large masses of eclogite, 

 some of which are 50 m thick. Hiis eclogite is coarse and well preserved, 

 but contains epidote. 



Du es tel. hi the rocky hill SE of Duestol in Almklovdalen chloro- 

 melanite-eclogite of the Duen type, often much amphibolitized, alternates 

 with feldspar-bearing rocks intermediate between the eclogite and the labra- 

 dorite-rock. The specimens studied in thin sections contained plagioclase 

 (about Ab-^f,), clinopyroxene (altered into diopside-plagioclase-symplectite or 

 a symplectic plagioclase-hornblende-mass), enstatite, garnet, quartz and 

 epidote-minerals. Locally they pass over into pure labradorite-rocks and, 

 in the continuation of this rock-zone along the strike, there is a large body 

 of labradorite-rock near the Almklov farm. Here also many smaller masses 

 of eclogite occur in its neighbourhood. 



The occurrence near Duestol is, on both sides, bounded by dunite 

 and saxonite, only locally exposed. Thus the field connection of the three 

 rocks is quite apparent. 



r he m a r g a r i t e - b e a r i n g orb i c u 1 a i" lab r a d o r i t c - r o c k o n 

 Seljenaes, Nordpoll, Selje. This is an occurrence of a very peculiar 

 rock and would deserve a special treatment. Here I shall onl}'^ give a short 

 description of its uniciue characters, and mainly as .111 illustration of the 

 intimate connection between the labradorite-rock and the eclogite. 



