38 
foyaite. Going from the heights here towards the south-east, 
we meet in turn the outcrops of deeper and deeper layers 
of the igneous mass and thus come to know the whole series. 
The accompanying figures (Figs. 4 and 5) illustrate this condi- 
tion. Furthest to the west, at a height of 400—500 meters, we 
have the sodalite-foyaite and under this a thick sheet of naujaite; 
beneath the latter comes the just described alternation of nau- 
jaite lenses and black lujavrite, forming a sheet 100—300 meters 
thick which is inclined towards the west. Below and to the 
east the naujaite lenses become gradually scarcer and the rock- 
mass consists principally of black lujavrite; under this come 
lujavrites mainly green in colour, often alternating with the 
black in parallel sheets. In the Laxefjæld the green lujavrites 
rise to a height of 650 meters above the sea, and the platy 
Nunasarnausak 
Fig. 4. Section of the nepheline-syenite complex from Nunasarnausak to 
Laxe Elv. — Scale 1 : 38000. 
parting of the rock has a dip here of about 25° towards the 
north-west. The uppermost peaks of Laxefjæld consist of augite- 
syenite, which rests upon the lujavrite, the contact plane being 
almost horizontal or with a slight inclination towards the south- 
east; at some places here the lujavrite is observed to send out veins 
into the augite-syenite; at other places the latter contains veins of 
nepheline-syenite pegmatite near its boundary towards the lujavrite. 
Between the lujavrite sheets of the Laxefjæld appears as a 
subordinate mass (Fig. 5) the characteristic, banded kakortokite ; 
this towards the south, in the mountain called Kringlerne, swells 
up to a thickness of several hundred meters and will be de- 
scribed below. Under this we find again the black lujavrite. 
