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rock has since had its distribution and its character made 

 known through Kolde wey's and Ryder's Expeditions. As 

 to the occurrence here of other eruptive rocks, it was the 

 Swedish Expedition under Nathorst that first enlarged our 

 knowledge. The material collected during this expedition and 

 afterwards described by Back s trom, consists partly of a rhyolitic 

 quartz-porphyry from C. Broer Ruys, partly of quartziferous 

 aegirine syenite and a tinguaite from C. Parry, partly of an 

 alnöitic rock of the monchiquite group, a block of which was 

 found on the Fame Is. 



The discovery of the last series of rocks was of great 

 interest, but the material collected did not suffice to give a 

 survey of their appearance in this area. The Danish Expedition 

 collected a fairly extensive material both of these as also of 

 the basalt rocks, though not so extensive as the interest in 

 these rocks advocated. As we shall see, formations are not 

 altogether lacking which seem to connect the basalts with the 

 remaining rocks, but in the main these two groups must be 

 regarded as essentially separate, since, at least in their bulk, 

 the former must be considered much younger than the other. 



A. Older Eruptive Rocks. 



(Age presumably Paleozoic.) 



With the material before him Bäckström felt justified in 

 connecting the monchiquite, found on the Fame Is., with the 

 rocks from C. Parry, bringing forward as a possibility that the 

 block in question had been carried by the ice from the more 

 northerly area. Since then I have succeeded in coming across 

 the rock in situ on Liverpool Land. I do not know the rocks 

 from C. Parry except from Bäckströms description, but, in 

 return, I found a new occurrence at C. Fletcher, from where 

 an extensive series of samples was brought back. These rocks 

 differ from those at С Parry in that plutonic rocks with a 

 granitoid structure are entirely wauling, but otherwise there 



13' 



