PART IL— PETROGRAPHY OF FIJI. 

 By Wilbur G. Foye. 



TABLE OF CONTENTS. 



Page 



Introduction 99 



Previous work 99 



Sedimentary rocks 101 



Marl ' 101 



Conglomerate 102 



Limestones and marbles 104 



Igneous rocks 105 



Rocks from Viti Levu 105 



Tonalite 105 



Dioritic gabbro 107 



Aporhj'olite 107 



Feldspar porphyrite 108 



Olivine basalt from Tamavua River 108 



Olivine basalt from Lautoka 109 



Olivine basalt from Na Sana Sana 109 



Rocks from Mbengha 110 



Basalts composed chiefly of Augite and Feldspar 110 



Basalts composed chiefly of Augite and Feldspar with Olivine 111 

 Basalts composed chiefly of Augite and Feldspar with Horn- 

 blende Ill 



Rocks from the Yasawa Group Ill 



Basalt Ill ■ 



Hornblende andesite 112 



Rocks from Vanua Levu 113 



Summary of the petrography of Vanua Levu as given by 



Guppy 113 



Plutonic rocks 113 



Volcanic rocks 113 



Description of rock types collected by the writer 115 



Rocks from the Mbutha Bay district 115 



Basalt 115 



Hypersthene basalt 115 



Rocks from the Lambasa district 115 



Gabbro 115 



Basalt 117 



Foraminiferal basaltic ash 117 



Andesitic porphyrite and pitchstone 117 



Rocks from the Savu Savu Bay district 118 



Hypersthene basalt 118 



Basalt 118 



Rocks from the divide between Lambasa and Savu Savu 



Bay districts 119 



Basaltic conglomerate 119 



Gabbro porphyrite . • 119 



Rocks from Taviuni 120 



Andesitic basalt 120 



Olivine-gabbro porphyrite 120 



