84 
a recent local glaciation. With its vertical walls, its deeply 
notched ridges and small glaciers Ilimausak in its higher parts 
presents a fragment of magnificent Alpine scenery. 
Over the plateau and near its southern margin rise two 
isolated peaks, Mount Steenstrup (‘‘Steenstrup’s Fjeld” 1370 
meters) and the highest point of Ilimausak which is about 1450 
meters high (see PI. VI, Fig. 2). So far as known, the latter 
has never been ascended by any traveller. Between the two 
peaks a small glacier descends towards the У. $. W. (Pl. XIII, 
Fig. 1). The glacier fills the uppermost part of a broad U-shaped 
valley which in its whole length bears the mark of glacier 
sculpture. Only below each of the numerous water-falls the 
river has excavated small ravines after the glacier has retreated 
to its present position. 
South and south-east of the two highest points there is a 
row of three peaks of less height running in east to west di- 
rection; these are outliers of the plateau, separated from it by 
a number of partially confluent cirques. The central peak of 
these three, ‘‘Hatten”, has a distinctly hat-like form and com- 
mands the whole view of the mountain-group when seen from 
Tunugdliarfik (Pl. X, Fig. 1). In the two cirques which meet 
behind ‘‘Hatten” and no longer contain any glacier, rise the 
two earlier-mentioned brooks, which flow down towards the 
south and south-east to North Siorarsuit. 
The principal features in the geological structure of the 
Ilimausak mountains are as follows. The plateau as also the 
two highest peaks are built up in part of effusive, in part of 
intrusive sheets of porphyries, porphyrites and diabases, which 
are inclined slightly towards the south; they are older than the 
underlying, abyssal complex. The latter is stratified, but the 
abyssal sheets are strongly and somewhat irregularly inclined. 
The arfvedsonite-granite is the uppermost sheet and under this 
come the quartz-syenite, the pulaskite and the nepheline-syenites. 
The greater part of Ilimausak is readily accessible. But 
