11 
lavat Mountain: here the granite rises in an extremely picturesque 
mountain ridge to a height of 1260 meters (Fig. 1). 
The Julianehaab granite has great power of resisting 
weathering. The flanks of the mountains are frequently very 
steep and the talus at their foot is comparatively small in 
amount. In several places the surface has not suffered any 
desintegration since the inland-ice retired from the district, and 
almost everywhere the lichen-coatings impart to the mountains 
a dark and monotonous appearance. Near the shores and in 
sheltered localities fairly dense birch and willow copses may 
sometimes be met with. 
Petrography. — The distinctive character of the Juliane- 
haab granite as compared with the more ancient granitic rocks 
is the absence of gneissic or dynamic structures. In some 
cases, however, a slight indication of banding is observed, but 
this is of primary origin and is not accompanied by any kind 
of cataclastic structure. As to colour, the rock most frequently 
is white or light gray, but reddish varieties are by no means 
uncommon; near Igaliko and in some other places the granite 
is intensely red-coloured. 
Mineralogically the rock is an ordinary hornblende-bearing 
biotite-granite. It is coarse-grained, compact (not miarolitic), 
and frequently of a pronounced porphyritic structure produced 
by some of the felspar crystals attaining a length of one or 
two centimeters while the average size of grain is much smaller. 
Under the microscope the dominant felspar is seen to be a 
microcline of the ordinary cross-hatched twin-structure, some- 
times with and sometimes without perthitic veinlets. Oligoclase 
occurs subordinately. The quartz is allotriomorphic and mostly 
interstitial between the felspars. The dark-coloured constituents 
are a brownish-green biotite and a common green hornblende, 
as a rule in about equal amounts. As minor accessories occur 
magnetite, titanite, zircon, and apatite. 
The rock has not been analysed chemically, but it may be 
