BY D. MAWSON. 



443 



SAONE (SSSrt. I 



Corsl linttton* 



ssogt bcdc. 



Stream. The second was along a track leading from White 



Sands to the village of Saone,* then back by the steep gorge of 



the Ai Stream (text-tig.5). 



A third traverse run across 



the tableland from Meli 



Bay to Havannah Har- i? 



bour gives a good general 



idea of the surface-contour 



and terrace-formation (text- 



fig.6, p.444). 



Much faulting is to be 

 expected in a region such 

 as this, where thick beds of 

 soft rocks are developed 

 close to volcanic centres 

 and where orogenic pro- 

 cesses are actively in pro- 

 gress. In the Steep Gully 

 section a fault with a down- 

 throw to the north was 

 noted; this same fault, Fig.5. Section of the beds underlying Saone 

 though not proved in the as exposed in the Ai Stream gorge. 

 Ai Stream traverse, may have thrown down the 40 ft. bed of fine 

 tuff, thus duplicating it in the section. 



These faults ante-date the development of the coral veneer, 

 and so do not show on the surface; for this reason and from the 

 fact that suitable outcrops were not always available, other faults 

 may have been omitted from our sections. 



Leleppa preserves the same general characters exhibited on 

 the adjacent mainland. Coarse pumice tuff, with fragments of 

 brown glass, persists to an elevation of 250 ft. Above this is a 

 yellowish submarine tuff composed of numerous fragments of 

 maruie organic remains in a fine-grained soapstone-like base; 

 this rock is similar to the fragment found on the mainland in the 



* For surface sections of terraces met with on this occasion, 

 Preliminary Note ' in Report A. A. A S., 1904. 



