36 
H. T. FERRAll. 
At the foot of E 2 , dykes of fine-grained pink (711) and grey (710) granite force 
their way into the gneiss and blend with the sheet of granite. East of the 
shoulder E 2 , a tongue of granitic rock ends the gneissic exposure, as if here bursting 
through from below. At the edge this tongue is mainly pink in colour, and 
occasionally there are large patches of almost pure pink-felspar-rock in it. When 
traced eastward it passes into a diorite, becoming gradually darker in colour (715) 
and coarser in texture, while well-formed black crystals of hornblende appear and 
increase in size up to a quarter of an inch in diameter. 
The relation of this rock to the granite making up the hill G 3 cannot be traced 
owing to the great mass of snow in the Descent Pass, but the sharp dividing line 
between the granite and the dark-coloured dolerite above it can be followed round all 
three shoulders and across to the tabular hill E, and thence along the east side of 
the South Arm for a distance of more than 10 miles, keeping almost exactly the 
same level all the way. This sheet-like mode of occurrence of the granite appears 
to be a constant feature in this area and is seen over the whole south side of the 
Upper Kukri Hills (Fig. 18). 
The Kukri Hills. 
The Kukri Hills project as a wedge into the depression where the ice from the 
South Arm meets that flowing east from the inland plateau. From them granite 
has been actually obtained at three spots, namely, (l) the western extremity below D, 
(2) near the middle of the south side below D 2 , and (3) the eastern end of the upper 
portion below the peak D 4 . (See Section III, Plate VII.) 
The hill D, as seen from the south, shows about 2000 feet of dark rock 
(dolerite) occupying the whole of the cliffs, which fall sheer to the level of the ice, 
here about 3000 feet above sea-level. In the middle of this great mass of dark rock 
are three large triangular masses of a light-coloured rock which are plainly visible 
eight miles away. At the western foot of D is a still larger mass of pale rock which 
must be 1000 feet thick at least. Viewed from the north and west, this rock, which 
proved to be a pink granite, could be seen sending tongues into the columnar dolerite, 
and the junction of the two (699, 700, see p. 128) was seen to be quite irregular ; 
it is quite clear that the granite is here the later intrusion. The joint-planes of the 
granite dip to the north-east at an angle of nearly 30°; the granite (701 ), though 
generally pink in colour, has occasional dark-grey masses (702-703) locally contained 
in it. 
The eastern end of Solitary Eock (D 5a ) shows four bands of rock with regular 
horizontal junctions. Two of these bands are dark-brown and two are light-yellow 
in colour, and the alternation of the colours suggests that the rocks are like those 
seen on the north side of the North Fork, where yellow and black bands occur in 
the same order and with similar thickness. 
