GEOLOGICAL OHSKUVATlO.NS I\ FIJL 



07 



The main puzzle of the ishuid is eonneeted with its voU'aiiic roeks. 

 Although no igneous-rock basement is exposed, a hill, Ndelai Yaloi, 

 350 feet high, at the northwestern corner of the island, has been found 



Figure 32. Sketch Map and Profile of Ndelai Yaloi, Kambara. 

 White — elevated coral reef. Dashed — intrusive dike of basalt. Dotted 

 — sandy flats. 



to be composed of basalt, rich in olivine. J. Stanley Gardiner, (189S, 

 p. 464) states that the " basalt, which has apparently welled out from 

 a fissure near the base of the limestone cliffs — gradually increased 

 in height, so as finally to overflow them and form a high hill." 



