i'F.NTTi f:.skola. M.-\. Kl- 



"On Kndhaiij^cn .'ind nem" Lien tli<-rc occur, in tlic compact variety oi 

 olivine-rock, a few dikes or layers, some two (Vet thick, of a rock o! 

 extraordinary beauty, a f^arnet-oli\'ine-rock." 



In the later publication ol" II. Keusch^ this rock is named olivine- 

 bearing eclogite and is said to be composed of red garnet and light green 

 omphacite with which are associated olivine, in part in the state of incipient 

 serpentinization, a brownish green hornblende and a little rutile. 



The specimen of eclogite from Alniklo\dalen subjected to quantitative 

 investigation did not contain olivine. 



Besides these occurrences in Alniklo\dalen but one of eclogite in 

 olivine-rock, near Taijord in the parish of Nordalen, Søndmøre, is known. 

 J. II. L. Vogt- gives the following description of it (in translation): 



"On Kalskaret the passage between Tafjord and Merdalen, .several 

 masses of oli\'ine-rock occur". — — 



"In several lenses one finds certain zones of garnet-olivine-rock — — . 

 This is the most beautiful and finely coloured rock that I have seen, 

 especially in weathered blocks where the red garnet and the green olivine 

 are embedded together in the yellow weathered olivine-rock. I interpret 

 these lenses as differentiated bands in the olivine-rock, especially as, in the 

 garnet-olivine-rock itself, ' there is a stead}' variation of different laminae, 

 some more coarsely grained, others richer in garnet and others richer in 

 olivine and still others consisting of the common olixine-rock. And all these 

 various alternating laminae which mosth' grade into one another without 

 sharp boundaries, are parallel to the jointing and foliation of the olivine- 

 rock as well as to the elongation of the lenses and the body of olivine- 

 rock itself". 



I had two specimens of the Tafjord eclogite for study, one marked 

 "Kalskaret, Tafjord" and another "Kjødhallen, Sch weigaards- 

 bro, Tafjord". Both are perfectly unaltered and bear much resemblance 

 to the Almklov eclogite anal3zed. They are free trom olivine. 



The most striking structural feature of the Tafjord eclogite is the 

 mechanical deformation oi' its pyroxene. What has not been granulated 

 shows a strong undulatory extinction and bending. 



The specific gravity of the rock from Kalskaret was found to be 3.45, 

 while that of the Almklov eclogite was 3.51. 



1 ha\"e myself undertaken field-studies on the occurrences in Almklov- 

 dalen. Those on Redhaugen near H el le bust, described by Reusch, 

 show little variation and have been more or less altered into the green- 

 schist faciès, while the rocks between die farm Lien and the little lake 

 Helge horns vand are very varied and many of them show such 

 fascinating colours that one feels tempted to describe them from the artistic 



' Loc. cit. (Forhandl. Vid. Selsk. 1883, p. 14 1. 



2 Loc. cit. (Xyt Mag. Naturvidensk. 27, 1883, p. 128». 



