10 FOYE. 



4. The uplifted, marine, volcanic rocks of Vanua Levu and the 

 elevated limestones of the Lau and Yasawa islands are held to be 

 Pleistocene or Recent and allied in age to the coastal-plain series. 

 All of these rocks were uplifted without folding. 



5. The folding of the rocks of the interior of Viti Levu corresponds 

 to the trend lines discerned by Suess elsewhere in Oceania. 



6. As far as observed, the elevated limestones of Fiji rest uncon- 

 formably on eroded volcanic rocks. They were deposited during the 

 subsidence of eroded volcanic islands and are believed to have formed 

 atolls and barrier reefs. 



7. An adaptation of Darwin's theory is especially well illustrated 

 in Fiji, since the earth's crust here has been so unstable. Most periods 

 of subsidence have been accompanied by reef formation. 



8. There has been a positive shift of sea-level on many of the islands 

 during late geological time. The two main factors which have pro- 

 duced the shift are subsidence and the return of waters to the ocean 

 after the Glacial period. No criteria have been found to evaluate the 

 relatiA'e importance of the two factors. 



9. The reduction of masses of elevated limestone to sea-level by 

 atmospheric solution and the submergence of the platforms thus 

 formed have produced conditions favorable to the upgrowth of 

 barrier reefs and atolls. 



10. * Certain reefs near Suva are growing on the delta flat of the 

 Rewa River, as did other, now uplifted, reefs in a previous epoch. 



11. The barrier reefs, east of Lakemba and northwest of Viti 

 Levu, arc believed to have developed in part as a result of the tlown- 

 ward tilting of the earth's crust in recent times. 



12. Limestones, buried beneath volcanic rocks, are exposed at the 

 southeastern side of Kandavu. The erosion types in the island indi- 

 cate an extended historw 



GEOLOGICAL HISTORY OF VITI LFM'. 



rilVSlOGU.YPlIY. 



The island of Viti Levu is elliptical in shape. It is 94 miles long 

 from east to west, and 55 miles broad. The southeastern side of the 

 island and a large portion of the eastern side is a low delta flat, over- 

 grown with mangrove l)ushes. The flat merges into a young, narrow 



