102 
up to 30 meters and their direction is almost N. 60° E.—S. 60° W. 
They are probably connected with the extensive intrusive mass 
of red arfvedsonite-granite, which is met with a short distance 
east of the top of Kakarsuak. North-east of this intrusive mass, 
which is only a few hundred meters broad, we again come 
across the essexite-porphyrite, here filled with numerous frag- 
ments of sandstone. Following the plateau further towards the 
north-east, the essexite-porphyrite soon joins the ordinary por- 
phyries, which lie in distinct sheets and have been described 
above (p. 88). 
SOUTH COAST OF SERMILIK. 
GENERAL FEATURES. 
The south coast of Sermilik offers a magnificent, geological 
section (see Pl VI, Fig. 2). The cliffs rise almost vertically out 
of the water like a straight wall 1000—1200 meters high, and 
above the wall extends the snow-covered Ilimausak plateau 
deeply notched by picturesque glacier-filled cirques and зиг- 
mounted by the two highest peaks of Ilimausak. The eastern 
part of this imposing wall, which is about 20 kilometers in 
length, is built up of the red sandstone, and as the surface of 
the cliffs is not covered by any vegetation, the dark red colour 
of the sandstone is conspicuous at a long distance. The sand- 
stone formation is traversed by numerous dykes and sills of 
diabase and porphyry; as the dykes run almost parallel with 
the coast, they appear often like the sills as horizontal, dark 
bands in the cliff-wall. In the middle part of the section the 
sandstone is covered by the dark masses of the volcanic series. 
In the western part the cliffs are somewhat lower and from the 
sea upwards to about 600 meters consist of nordmarkite, over 
which the volcanic rocks form a cover. 
