32 
Chapter V. 
THE GRANITES. 
Though granitic rocks had not been found in situ in the Ross Sea area, the 
frequency with which fragments had been dredged up by the various ships proved, 
if not a wide distribution, at any rate a great local development of this kind of rock 
in the area under consideration. If we neglect the occurrence in moraines such as 
those found on the basaltic peninsula of Cape Adare or on the slopes of the volcano 
Fig. 15. — Dolerite upon Granite on the north side of Granite Harbour. 
Mount Terror, there are two localities where granite has actually been found in 
place. At the first, which has been called Granite Harbour, in latitude 77° S., the 
granite abounds ; though no other rock could be examined in the time available, a dark 
rock was seen capping the granite (Fig. 15); that this is dolerite is almost certainly 
proved by the plateau-like form of the hills on the side of the harbour 
remote from our landing-place, and by the finding of dolerite-fragments on the 
scree-slopes (see p. 54). The second locality is the Royal Society Range ; here the 
granite has been examined at several spots over a distance of some 20 miles, and 
appears to occupy an area of quite 200 square miles. This district may con- 
veniently be subdivided into two areas — (l) the Snow Valley west of the Northern 
Foothills, where the granite occurs in isolated hills, and no other kind of rock has 
been seen ; (2) on the two sides of the Ferrar Glacier, where granite, and its relations 
to the rocks both above and below, have been examined. 
