10 



same vein are also parts containing crystals of muscovite, an 

 inch in length. Both these rocks are worthy of closer investi- 

 gation. 



The district nortli of lat. 66^ N. 



The specimens from this district have been collected from 

 a few localities only, viz. Cape Wandel; Cape Jørgensen; 

 and Ikersuak (Steenstrup's glacier) situated some 18 miles 

 further south; the promontory opposite Langø (Ikerasar- 

 miut) ; Lilleø, lying in the vicinity of the latter; and furthest 

 |o the north, Nualik, lat. 67° 15' N. 



The rocks collected from Cape Wandel consist of a mode- 

 rately coarse, grey or reddish, granitic rock, and a greenstone 

 which has doubtless traversed the former and which when 

 examined microscopically proves to be a basalt of a type exactly 

 similar to those described above from Cape Dan. 



Among the specimens collected to the north of this locality, 

 not a single typical granite or gneiss occurred, and of rocks 

 which are known for certain to be Archæan, only the under- 

 mentioned peculiar granulites from Nualik were found. Kruuse, 

 however, particularly emphasizes the fact that these species of 

 rocks constitute the chief part of the base of the rocks, and 

 Lieut. Amdrup also mentions them from the districts lying 

 further northward up to 69° latitude. How far this may be 

 owing to a confusion with any of the under-mentioned species 

 of rocks, or whether their non-appearance is quite accidental 

 I cannot say for certain M- 



M I have not met with true massive granites north of Cape Wandel, where 

 I found variously coloured (red, white, grey) "granites, traversed by 3 

 greenstone dykes. Grxstalline schists occurred as the chief kind of rock 

 as far as 1 penetrated, but they were traversed by eruptive dykes so 

 numerous and of such great size as to constitute more than one-third 

 of the mass of the rock walls. As the expedition had also other objects 

 iti view 1 was prevented from bringing any larger collections, and I 



