I92I. Xo. 8. ox THE ECLOGITES OF NORWAY. 53 



rather than from the petrologicai point of view. Still a few garnet-bearing 

 nodules were observed in a smaller occurrence of olivine-rock at another 

 locality named Redhaugen, near Du est øl, and erratic boulders of 

 eclogite etc., probably derived from the olivine-rock mass southeast of 

 Du es tel, were found near the same farm. 



The band-formed masses, though small in size, are exceedinglv variable 

 in composition. Besides some of eclogite there are also almost mono- 

 mineralic nodules consisting either of garnet or diopside, and all the pos- 

 sible bi-, tri- and tetramineralic associations of olivine, garnet, diopside 

 and enstatite. 



Diopside-garnet-rock or eclogite is perhaps most common. 

 The inclusions have sharp boundaries, but the olivine-rock near the con- 

 tact is rich in garnet and diopside. This eclogite at times contains a very 

 deep-green chrome-diopside, but in other cases it is pale light green and 

 forms with the pale rose garnet a most delicate colour combinations. 

 This garnet is often quite xenomorphic. 



Another exceedingly beautiful rock is the tetramineralic combination 

 garnet-diopside-enstatite-olivine, forming a few bands some ten 

 centimeters thick with sharp boundaries. The three first-named minerals 

 form an almost centimeter-grained crystal mass whose interstices are filled 

 up with olivine. The same combination but with sparingly distributed 

 crystals of garnet, diopside and enstatite in the ground-mass of olivine 

 occurs as large masses all around the different segregations and was de- 

 scribed under the olivine-rock. 



The eclogite may pass over into garnet-diopside-enstatite- 

 rock or enstatite-eclogite, found at several points. In one of these 

 bands the diopside almost disappears and the mineral combination may be 

 called an enstatite-garnet-rock. It contains small dark red garnets. 



Diopside-garnet-oli vine-rock, or olivine-eclogite, forms gradual 

 transitions from the eclogite into the pure olivine-rock. Occurring in the 

 same manner there was also found enstatite-garnet-oli vine-rock 

 and diopside-en s tatite-oli vine-rock. 



The association olivine-diopside was found as small nodules with 

 boundaries not sharply defined. 



Oli vine-garnet-rock without diopside was only found as an erratic 

 boulder near Duestøl. 



01i\"ine-enstatite-rock or saxonite is fairly common and was 

 described on p. 21. In the occurrence south of Duestel, this grades over 

 into an enstatite-rock. At the same place the enstatite also was found 

 as a fissure vein in which the long prisms of enstatite are arranged at 

 right angles across the vein, like fibres of asbestos. It has been greatly 

 altered into talc. This occurrence is remarkable as illustrative of the different 

 appearance of all the other bands. 



