a9 
broad, fine-grained border-facies, which is comparatively poor 
in dark-coloured minerals. The contact-plane shows an ir- 
regular, sinuous course, but is on the whole vertical and runs 
in a north-easterly direction. 
From the place mentioned the augite-syenite belt continues 
towards the north-east and upwards, and the rock is here ex- 
posed in dark, steep walls; it contains rounded fragments of 
the sandstone. Further to the north-east the syenite belt is 
greatly restricted in breadth and on bending round the east 
end of Nunasarnausak the rock assumes the character of an 
igneous breccia, being quite filled with white, metamorphosed 
sandstone fragments resembling quartzite. The syenite sends 
out long and very conspicuous apophyses between the sand- 
stone beds (see Pl. V). These apophyses are quartz-bearing. 
Directly east of the uppermost plateau of Nunasarnausak the 
augite-syenite reaches an altitude of about 650 meters, and the 
syenite zone continues from there downwards in a north-westerly 
direction with greatly increased breadth. 
The contact between the augite-syenite and the uppermost 
diabase-sheet of Nunasarnausak is exposed to view for a long dis- 
tance. The diabase shows distinct signs of contact-metamorphism 
to a distance of 10 meters from the contact, displaying the charac- 
teristic lustre which indicates the presence of newly formed 
biotite; directly at the contact the biotite flakes may attain a 
size of half a millimeter. The syenite sends offshoots into the 
diabase and contains contact-metamorphosed fragments of it. 
5. Under the augite-syenite nawjaite appears at the foot 
of the eastern part of Nunasarnausak. The contact surface 
between these two rocks intersects the north coast of the 
Kangerdluarsuk Fjord at a spot which lies almost due west 
of the small island. In consequence of the solifluction the 
immediate contact is not exposed to view, but as far as could 
be ascertained both rocks have their usual size of grain, at 
least to a distance of less than two meters from the contact. 
