73 
porphyrite. The bedding-planes are on the whole slightly in- 
clined towards the south-west. 
The south-west point of Nunasarnak consists of nepheline- 
syenite, and the junction of the abyssal rock with the stratified 
main body of Nunasarnak is finely exposed (Fig. 12). Just at 
the contact a slight depression runs transversely across the 
peninsula, and south-west of the depression the nepheline- 
syenite rises аз a small elevation about 300 meters high’. 
The nepheline-syenite of Nunasarnak is a naujaite which 
is broken up into a large number of lens-shaped masses sep- 
Nunasarnak 
РР Laas 
WSW Naujaite with veins of lujavrite and 
Fig. 12. Junction of nepheline-syenite and stratified rocks. 
South-west point of Nunasarnak. 
arated by a network of arfvedsonite-lujavrite veins. Petrographi- 
cally the naujaite is extremely variable. Besides the typical 
naujaite described above, we find here varieties in which the 
sodalite crystals are so abundant, that the other mineral con- 
stituents are quantitatively of quite subordinate importance and the 
1 STEENSTRUP (Meddelelser om Grønland II. 1881, Pl. 1) called this locality 
Kumerngit (perhaps a corruption of “Kingmernat” (“bilberries”), a plant 
which is very common here). This.name does not seem to be known 
any longer by the Greenlanders. — In 1888 STEENSTRUP found here а 
variety of nepheline-syenite of a foyaitic structure and with small brown 
crystals of eudialyte, which on microscopic examination proved to be 
partially transformed to catapleiite (see N. У. Usstnc, Meddelelser om 
Grenland XIV, p. 167); the earlier described. sodium-free microcline was 
found in pegmatitic segregations in this reck (Meddelelser om Gronland 
RIV-ap% 12): 
