72 
granite and smaller sandstone fragments. It is only at a distance 
of about 150 meters from the border of the nepheline-syenite 
that we meet with the unbrecciated and uniform Algonkian 
granite in the coast-cliffs. 
The character of the landscape changes at the boundary of 
the nepheline-syenite. East of Agpat the naked, strongly co- 
loured cliffs and the large rubbish-covered plains without vegeta- 
tion disappear and are replaced by dark, lichen-covered hills of 
hard granite, and in the valleys a comparative abundance of 
birch and willow copses make their appearance. 
NORTH COAST OF TUNUGDLIARFIK. 
On the north coast of Tunugdliarfik Fjord we have higher 
and steeper mountains than on the south coast and thus gain 
a more complete insight into the structure of the stratiform 
abyssal complex. Pl. VI, Fig. 1, gives a picture of the most 
instructive part of this coast. The highest peaks of Ilimausak 
are composed of porphyries, which originally formed the roof 
of the subterranean magma-reservoir. Under this roof the 
abyssal rocks are exposed to view from an altitude of about 
1100 meters down to the surface of the sea. In the following 
description the more important localities on this coast will be 
dealt with in order from north-east to south-west. 
NUNASARNAK. 
Nunasarnak (Pl. XIV) is a mountain ridge with a flat top, 
which forms a peninsula on the north side of Tunugdliarfik 
Fjord. It reaches a height of 620 meters above the level of 
the sea. The sides are steep and the ridge can only be as- 
cended from the north-eastern end. The whole mountain con- 
$1515 of alternating beds of sandstone and sills of diabase and 
