54 
II. T. FERRAR. 
sandstone-dolerite area is at least 
50 miles long in a north-and-south 
direction, and has an extent of 2500 
square miles at least. 
A few of the hills in this neigh- 
bourhood, and especially the hill we 
called Obelisk (C 3 ), 10 miles east of In- 
land Forts, are pointed (Fig. 39, p. 72) 
and resemble the hills in the Torridon 
Sandstone districts of north-west Scot- 
land ; we may surmise that in these 
cases the. cap of dolerite is lacking. 
In Granite Harbour a dark rock 
which weathers like columnar dolerite 
may be seen above the granite (see 
p. 32), and further up the coast to the 
north the higher peaks of many of the 
hills were formed of a dark rock and 
stood out in striking relief over the 
Inland-ice against the cloudless sky. 
The black tabular formation is most 
striking about latitude 77 c 0' S., longi- 
tude 164° 49' E., and again in latitude 
75° 57' S., longitude 163° 5G' E. 
The area occupied by the Sand- 
stone Formation is a question still to 
be solved. At the outskirts of the 
area indicated above there seems 
to be no doubt the sandstone has 
an enormous thickness, roughly 
2000 feet. Lieutenant M. Baene 
records horizontal structures in lati- 
tude 80° S., and Lieutenant E. II. 
Shackleton has taken a photograph 
still further south which shows the 
plateau-features to be still prominent 
there. Towards the north we need 
only mention Mount Nansen in lati- 
tude 75° 30' S., and the pyramidal 
forms of the peaks of the Admiralty 
Range discussed above. 
