No. 7.] APATITE IN NORWAY. 429 



For a short stretch between this and the following vein the 

 " spotted gabbro " is replaced by a compact white labradorite, 

 containing innumerable red specks of rutile. 



No. 10 exhibits very interesting relations. The vein-mass, 

 which consists of phlogopite with crystals of hydrous enstatite 

 scattered here and there, encloses, in its upper portion, large 

 bean-shaped lumps of dark apple-green and brown kjerulfine. 

 Deeper down large lumps of the country-rock (partially " sand- 

 stone ") and of apatite are enclosed by the vein-mass. Still 

 deeper the vein has much the same character, although some- 

 times compact apatite occupies its centre. 



Besides the minerals already mentioned, we observed in the 

 veins of Oedegarden rutile rarely, sometimes in crystals. And 

 on the dump of vein No. 2 we found rutile and brown titanite 

 with green kjerulfiue. 



Calcspar, quartz, pyrites and copper pyrites were found in 

 stringers, and tourmaline and albite in a geode (vein No. 1). 



Finally there occurred in the clay that overlaid the foot of 

 the ridge, as a secondary formation, specks of a blue mineral 

 consisting chiefly of iron and phosphoric acid, apparently vivi- 

 anite. 



Oedegardskjern. 



The bold N. W. Shore of the small lake that lies a little to 

 the S. E. of the deposit just described consists of a kind of rock 

 closely resembling the " spotted gabbro " of Oedegarden. 



Here there have been principally mined three large vertical 

 veins, which can partially be characterised as " apatite-bearing 

 veins of enstatite." The most westerly of them is a vertical vein, 

 up to six feet in thickness, of granular green enstatite, locally 

 intersected by stringers of an almost compact bluish-black 

 variety. Towards the lake the vein carries on its western side 

 much apatite, which farther on separates from the large vein- 

 mass as a distinct vein, along with some green bronzite and 

 rutile ; both veins are intersected by stringers of quartz. Close 

 to the large vein there are several striagers, consisting partly of 

 apatite-bearing hornblende and partly of a mixture of rutile 

 with some hornblende and calcspar. 



Farther eastward there occurs a vertical vein striking N. N. W\, 

 -which has yielded about 60 tons of apatite. It consists at the 

 sides of hornblende, and in the middle of apatite and some rutile. 

 Small bits of the country-rock were enclosed in the apatite. 



