GEOLOGICAL OBSERVATIONS IN FIJI. 



Hy WiLium G. FOYE. 



PART L— GEOLOGICAL HISTORY OF FIJI. 



TABLE OF CONTENTS. 



Page. 



Introduction 5 



Itinerary 6 



Previous Work . 8 



Abstract 9 



Geological History of Viti Levu 10 



Physiography 10 



Western Viti Levu 11 



Singatoka District 11 



Yasawa Group 17 



Outline of the Geological History of Western Viti Levu . . 19 



Eastern ^'iti Le\ai 20 



Comparison of Results with Those of Previous Workers .... 25 



Geological History of Vanua Levu 26 



Introduction 26 



Physiography 26 



Lambasa District 27 



Northern Coast of Vanua Levu, East of Lambasa 30 



Mbutha Bay District . 31 



Southern Coast of Vanua Levu 33 



Taviuni 37 



Comparison of the History of Vanua Levu with that of Viti Levu . . 41 



Geological History of the Smaller Islands, Especially of the Lau Group 43 



Introduction 43 



Group I — Islands Composed of Limestones and Volcanic Rocks 44 



Exploring Group 44 



Vanua Mbalavu 46 



Avea 49 



Yanu Yanu 50 



Malatta 50 



Susui 51 



Thikombia-i-lau 52 



General Remarks on the Exploring Group 54 



Tuvuthd 56 



Lakemba 58 



Ono-i-lau 61 



Kambara 65 



Group II — Islands Composed Wholly of Limestone 69 



Introduction 69 



Wangava 69 



Ongea 71 



Vatoa 72 



