GEOLOGICAL OBSERVATIONS IN SOUTH GEORGIA. 



807 



along the shore escarpment below Mount Paget on the south-west coast, powerful 

 faults must run along the shoulders of Mount Paget. 



These faults have let down the strata on either side of the axis of the central 

 range. The escarpment at the crest of Mount Paget is in all reasonable probability 

 the same as occurs in Moraine Fiord. Hence a powerful fault must run parallel to 

 the axis of the central range, and effect a downward displacement towards Cumber- 

 land Bay of not less than 4000 feet. The throw is more than likely to be over 

 that amount, and may readily be 6000 feet. 



On the south-east side of Moraine Fiord occurs one of the patches of the old 

 rocks of the Cape George Harbour Series. They are tilted up at a steep angle and 

 dip into Cumberland Bay. With the above exception the rocks surrounding- 

 Cumberland Bay are very similar to those of Leith Harbour. The rocks of the 

 middle division occupy all the high grounds, and those of the lower division fringe 

 the rim of the bay in places near sea-level. There is no evidence of any rocks of 

 the upper division. PI. LXXXVII, fig. 2, shows the uniform banding of the middle 

 and lower divisions, rising out of Moraine Fiord, and the middle division rocks are 

 also seen at the crest of Mount Paget. 



The most intense folding and crumpling of the rocks here, as at Leith Harbour, 

 is nearest the north-east coast (PI. LXXXV, tig. 2). 



Cape George and Vicinity. 



The rocks on the coast here belong to the middle division. At the head of Cape 

 George Harbour, while the dips are steep in places, the crumpling has to a con- 

 siderable extent disappeared, and the middle division rests unconformably on the 

 oldest rocks in the island, the greenish-grey banded rocks of the Cape George Series. 



yr 



Rocks of the middle division resting unconformably on the Cape George Series. 



The middle division dips 25 to 30 degrees to the north, while the Cape George 

 Series dips 45 to 60 degrees in a direction south 20 degrees west. The sketch shows 

 the relative position of the two series of rocks and the line of unconformity. 



The rocks of the middle division, the rusty-brown type, are without doubt un- 

 conformable to the Cape George Series underlying them. The latter dip at 



