especially at Stokes Point they are highly schistose and 



The beds on the western side of the island dip at high 

 angles (50° - 70°) to the west, and on the east at moderate 

 angles (30° -40°) to the east, so that the island appears to 

 consist of a ge-anticline of these beds. Such an assump- 

 tion is only provisional in view of the absence of any positive 

 measurements of dip and strike in the interior of the island. 

 The strike of the beds wherever measured was constant at 

 from 5° - 20° east of north (magnetic) with an average of 

 12°. The geotectonic line upon which the island lies, 

 therefore, has a general trend of north 20° east. This is 

 somewhat remarkable, for although it agrees with the 

 direction of the Cambrian and Pre-Caml>rinn axes north of 

 Adelaide, it is at marked variance with the same axes in 

 Tasmania and Victoria, which, as forming the western limb 

 of the great East Australian tectonic V, trend to the west 

 of north. Certainly the strike thus measured only extends 

 some thirty miles, but it is so uniform that there can be no 

 doubt of its continuity within reasonable distance of the 

 island. 



Another peculiar fact about the series is its remarkable 

 thickness. On the meagre measurements at our disposal 

 it is impossible to give any figure with certainty, but it 

 seems probable that one is understating the thickness at 

 20,000 feet. It is quite possible that more than one system 

 is here included, they being in approximate conformity. 

 But, except that towards the crest of the anticline, e.g., 

 at Stokes' Point, they are more schistose and possibly 

 dipping at a slighter angle, there is little to separate the 



Only at one locality was a series of consecutive measure- 

 ments obtained. This was in a traverse of two and a half 

 miles up the gorge of the Ettrick River, the dip varying 



