viii NA RARO 123 



stratified and dipping 'gently W, by S. Basic agglomerates also 

 occur in this district. 



In the promontory named Yanutha Point in the map there is 

 displayed an old flow of basaltic lava, showing a columnar structure 

 at the end of the point. The columns are 20 inches in diameter, 

 and are inclined about 20 degrees from the vertical in such a direction 

 that it may be inferred that the original flow, doubtless submarine, 

 descended at that angle from N.N.W. The dark grey rock of the 

 columns (spec. grav. 276) has a fair amount of interstitial glass, whilst 

 a blackish compact rock (spec. grav. 278) that represents apparently 

 a more superficial part of the flow has an abundance of smoky 

 glass in the groundmass. These rocks are basaltic andesites and are 

 neither vesicular nor scoriaceous, and come near the basalts of the 

 Kiombo flow which, however, contain some olivine (see] page 92). 

 They are semi-ophitic and are referred to genus 2 1 of the augite- 

 andesites which is described on page 283. 



Na Raro. 



In Na Raro we have one of the most interesting of the isolated 

 hornblende-andesite mountains of Vanua Levu. Unlike Vatu 

 Kaisia, which often eludes the observation, Na Raro is visible from 

 most points of view. It is double-peaked, the two peaks lying in a 

 north and south line and rising precipitously. It is this feature that 

 gives the mountain such a variety in its profile. From the north 

 and south it appears as shown in the accompanying sketch as a 

 sharp conical peak. From the north-east and south-east, as illus- 

 trated in the two other sketches, it has the form of a blunt or 

 square-topped mountain ; and its true shape is only shown when it 

 is seen from the east or west. In the photograph here reproduced 

 which was taken about i| miles to the south-west, the two peaks 

 are with difficulty distinguished. (See frontispiece.) 



Not many ascents have been made of these precipitous peaks. 

 Mr. A. Barrack, who kindly supplied me with some information 

 about it, made the ascent some years ago ; and Mr. Blyth (?), a 

 magistrate, also reached the top. There are stories of some big 

 officials being hauled up in baskets ; and the natives told me of a 

 white man who was seized with a shivering-fit when he arrived at 

 the summit. It is certainly a rather hazardous climb ; but the 

 safest plan is to resign oneself into the hands of the natives, who 

 " bundle " one up in an expeditious, if not in a very ceremonious, 

 fashion. Nareilangi, near the foot of the mountain on the north 



