30 
II. T. FERRAE. 
limestone and the dark foliated gneiss at the east end, a long stretch of the valley- 
side appears to be gneiss with foliation-planes dipping to the west, and therefore to 
agree with that met with on the south side of the valley near G 2 (Fig. 14). The white 
limestone (728) abuts upon a grey augen-gneiss (727), but the actual junction could 
not be examined as a hanging glacier lay upon it. The augen-gneiss appears to be 
part of the great mass which forms the lower and greater part of the hill and rises 
to quite 4000 feet. 
Below Ho. 
At Cape Bernacchi, 20 miles north of the Northern Foothills, the rock composing 
the hill Ho has apparently the same structure as that of New Harbour Height, or 
the hill H, while the elongate hill h t is a replica of the portion between II and in, 
and has structural planes dipping to the west. The rocks were not examined at 
this spot, but the serrated outline and the trend of the snow-water channels point 
to the structural lines being exactly parallel to those on the Lower Kukri Hills. 
The Cathedral Rocks. 
These rocks lie 40 miles from the coast, and rise to heights of over G000 feet. 
The glacier-surface at their base is about 1500 feet above sea-level, and the 
summits of the Royal Society Range, of which the Cathedral Rocks are the northern 
extremity, rise to altitudes of over 12,000 feet directly behind them. The Cathedral 
Rocks slope steeply down to the Ferrar Glacier, and form its right bank for a 
distance of 10 miles. They form three of the shoulders of the range just mentioned, 
and are separated by tributary glaciers which run out northward along narrow and 
steep-sided valleys. These shoulders project as aretes from the main plateau of the 
Royal Society Range. They are composed of gneiss, granite and dolerite, and may 
be topped by small outliers of sandstone (Plate III and Section II, Plate A 11). 
There is an exposure of gneiss at the foot of the central shoulder, which is 
designated E 2 on the map. This exposure rises 500 and 600 feet above the ice 
(Plate IV). The line dividing it from the granite is very sharp, and can be followed 
for a distance of some 3 miles along the glacier. On the west it is hidden by 
a sudden rise of the surface of the ice, and on the east is cut off by a boss of 
diorite (715), which appears to have burst through from below. 
The diorite forms the eastward half of this shoulder as well as the whole 
lower portion of the eastern shoulder _Ej. The gneiss is overlain by a sheet of 
pink granite, which, once known, is easily recognisable at a distance by the fact 
that the latter forms screes, whereas the former produces a cliff. Idle upper 
surface of the gneiss is a well-marked undulating line, cut oil short on the east 
where it meets the diorite. In certain other places several much smaller dykes 
transgressing the gneiss were observed. Of these dykes some are grey granite and 
