GEOLOGICAL OBSERVATIONS IN SOUTH GEORGIA. 811 



At Cape Pariadin the purple-blue shales have disappeared below sea-level, and 

 the creamy-white rocks and tuffs are alone evident. In Adventure Harbour these 

 rocks are well developed from the entrance at Cape Pariadin for some distance 

 inwards. PI. XCI, fig. 2, shows exposures and escarpments of the rocks of the 

 Cumberland Bay Series. 



The dips are not as a rule very steep in Adventure Harbour or round Cape 

 Pariadin, nor is there the same amount of folding to be witnessed as on the north-east 

 coast of the island. 



Wilson Harbour, Cape Demidov and Cape Nunes. 



The rocks surrounding Wilson Harbour and the island at its south-west point are 

 of the creamy-white variety of the upper division. The general dip is more or less 

 flat, with a very gentle inclination to south-south-west, but some sharp folds also 

 occur. 



Cape Nunes is composed of the same rocks as Cape Demidov. They probably 

 belong to the upper division, close to the junction with the middle division. 



Cape Nunes to Annenkov Island. 



The coast from Cape Nunes to a point opposite Annenkov Island is one continuous 

 sheet of snow or ice-cap. There are splintery crests of hills and fringes and patches of 

 rock between the glaciers at sea-level, or within 100 feet or so above it. The rocks 

 exposed appear to be similar to those of Cape Nunes and the coast north-west of it. 



The rocks of Annenkov Island are similar to those of Cape Demidov and Cape 

 Nunes. A line of fracture evidently runs through the island from north-west to 

 south-east. Just at the centre of the island the dip becomes vertical, and there is 

 some folding. 



The south or south-east side of the island is low, and formed of rocky escarpments, 

 which appear to run into the island, as there was a channel on which the sea was 

 breaking at the entrance. The rocks are the same as Cape Pariadin, and in the centre 

 of the island rise to a height of over 1000 feet above sea-level. 



The rocks dip apparently at very gentle angles to the south-west, and the rocks of 

 the upper division appear generally to occupy the south-west coast of South Georgia 

 and the various rock channels which are cut into it from the sea. 



South Georgia is a ridge mainly of stratified rocks, the axis of which, the 

 central or Allardyce range, is parallel with the general strike of the rocks. It has 

 parallel faults on either slope of the ridge, letting down the rocks to the north-east 

 and the south-west. The faulting is proved by the fact that the middle division of 

 the Cumberland Bay Series occupies the crest of Mount Paget, and has a slight 

 south-westerly dip, while the upper division forms the coast at sea-level on the 

 southern side of the island, and is seen in a few straggling beds on the northern 



