61 
second sill which consists of a diabase similar to that of the 
uppermost sheet; the thickness is much less, however, and 
shows considerable, local variation (from 20 to 60 meters). This 
second diabase sill thins out towards the south; on the south- 
west slope of the mountain (see Fig. 9, p. 57) the sill is seen 
very distinctly ending as a wedge, without appearing on the 
side of the mountain which looks towards Kangerdluarsuk. 
The second diabase sheet rests upon 30 meters of white sand- 
stone. Under this comes an intrusive sheet almost 20 meters 
thick and of great regularity; this is the same sheet that appears 
Nunasarnausak 750m 
к à « = 
` хуем Ее к x\— — 
а IE = 
РА === 
МЕ $ Siorarsuit FØRE sw 
Fig. 10. North-west slope of Nunasarnausak, above $. Siorarsuit. 
A, sodalite-foyaite covered by pulaskite; B. naujaite; C, naujaite with veins of lujavrite. 
as the second uppermost intrusive sheet on the face of the 
mountain towards Kangerdluarsuk (р. 57). It is a dark reddish 
. gray, dense rock, almost felsitic in outer appearance and 
probably a somewhat altered tephritic type. Passing downwards 
from this, we come upon a succession of sandstone beds, 
partly of white, partly of dark colour, alternating with ferru- 
ginous sediments which have been greatly altered by contact- 
metamorphism. At S. Siorarsuit the sandstone continues right 
down to the beach, but the strata gradually rise towards the 
south-west and on following the beach about 500 meters in this 
direction we meet with the underlying Algonkian granite. Fur- 
ther to the south-west the granite rises gradually to form a 
coastal strip of several hundred meters in breadth; at the 
