260 
Igaliko. This diorite area is also rather small. On ascending 
the mountain from the north western side one observes that 
the lower part of it is a granite of the usual type partially red, 
partially gray; the diorite appears again at an altitude of a litttle , 
more than 300 meters, and forms the western top (about 800 
meters) of the mountain. But at a short distance, perhaps half a 
kilometer, east of the top it again gives place to the biolite- 
granite. 3) A dark diorite without quartz occurs near Sigsar- 
dlugtok on the western side of the Igaliko Fjord. On its eastern 
side opposite to Sigsardlugtok the granite contains dark coarse- 
grained inclusions or segregations, which in their outer appear- 
ance correspond to the diorite from Sigsardlugtok. 
A rock, probably much older, is to be found near Kiagtut 
(on the northernmost part of the map, PI. IV), namely a strongly- 
marked foliated and somewhat porphyritic gneiss or gneiss- 
granite of a greenish-gray colour. 
Igaliko sandstone. — The Igaliko sandstone, no doubt, 
has originally covered large districts, but on account of dislo- 
cations accompanying or preceding the formation of the batholite 
and the long continued erosion, most of the sandstone has dis- 
appeared, and that which is now left covers four mutually 
separate areas (vide map, PI. IV). One of these, the sandstone 
of the Iganek Mountain, has been mentioned previously (p. 253). 
The sandstone area stretching westward to the Tunugdliarfik 
Fjord from the Igaliko hamlet is considerably larger. To the 
south, on the mountain Nulup Kaka, it is cut off by a fault, 
south of which the old granite rises to an altitude of 800 
meters. The sandstone attains a considerable thickness, more 
than 500 meters, due north of the fault, but northward the 
surface sinks, and the lower surface rises so that the layer 
becomes flat, and in the low depression, Itivdlersuak, connect- 
ing the Tunugdliarfik Fjord with the inner end of the Igaliko 
Fjord north west of the hamlet, the sandstone has entirely 
crumbled away by erosion. The inclination of the sandstone 
