60 
The augite-syenite contains irregular pegmatite veins, one or 
two decimeters broad, which consist of ægirine, felspar and 
nepheline. 
SOUTH COAST OF TUNUGDLIARFIK. 
On the south coast of Tunugdliarfik Fjord the nepheline- 
syenites are exposed to view over a distance of almost ten 
kilometers between South Siorarsuit and Agpat (see map PI. I). 
The cliffs along the coast are on the whole lower than those 
in the inner end of Kangerdluarsuk. At most places they des- 
cend vertically into the water and many of them are the favourite 
haunts of sea-birds during the breeding season. It is only at 
a few places that there is any convenient landing for boats. 
The principal landing-places and tenting-grounds, in order from 
west to east, are South Siorarsuit, Naujakasik, and Tupersuatsiak. 
For the sake of convenience the following description is 
divided into three sections; first the land round South Siorar- 
suit, including the north-western slope of Nunasarnausak and 
the western border of the igneous complex; then the mountains 
at Naujakasik and Tupersuatsiak; and lastly, the stretch Tuper- 
suatsiak to the eastern border of the igneous complex at Agpat. 
ENVIRONS OF SOUTH SIORARSUIT. 
At South Siorarsuit a cone of detritus projects a little 
way out into the fjord. It has a sandy beach on which numerous 
small icebergs lie stranded and landing is easy here. This place 
is the most convenient starting place for an ascent of Nuna- 
sarnausak. 
The north-west slope of Nunasarnausak (Fig. 10). — The 
uppermost part of the mountain is composed of an intrusive 
sheet of diabase, about 150 meters thick. It rests on a hard, 
white sandstone 50 to 60 meters thick, and under this is a 
