CONTENTS xvii 



CHAPTER XVII 



THE VOLCANIC ROCKS OF VANUA LEVU 



Their varied character, 235.— Their classification, 236. — Descriptive formula, 

 237-— Synopsis, 239.— Orders of the Olivine-Basalts, 241.— Orders of the 

 Augite-Andesites, 245.— Orders of the Hypersthene-Augite-Andesites, 247. 

 — Description of the Plutonic Rocks, 249 Pa^sj 235— 251 



CHAPTER XVIII 

 THE VOLCANIC ROCKS OF VANUA LEVU {continued) 



The Olivine Basalts Pages 252—265 



CHAPTER XIX 

 THE VOLCANIC ROCKS OF VANUA LEVU {continued) 



The Augite-Andesites • Pages 266 — 284 



CHAPTER XX 



THE VOLCANIC ROCKS OF VANUA LEVU {continued) 



The Hypersthene-Augite-Andesites Pages 285 — 292 



CHAPTER XXI 



THE VOLCANIC ROCKS OF VANUA LEVU {continued) 



THE ACID ANDESITES, TRACHYTES, QUARTZ-PORPHYRIES. 



The Hornblende-Andesites of Fiji, 293. — Occurrence of Dacites in Fiji, 294. — 

 Suggestion of "felsitic andesite" as a rock-name, 295. — The Acid Andesites 

 of Vanua Levu, 295. — The Hypersthene-Andesites, 296. — The Hom- 

 blende-Hypersthene-Andesites, 298. — The Ouartz-Andesites or Dacites, 

 302. — Tabular comparison of the Acid Andesites, 304. — The characters of 

 the Rhombic Pyroxene, 306. — ^Magmatic Paramorphism, 306. — -The Oligo- 

 clase Trachytes, 308. — Quartz-Porphyries and Rhyolitic rocks, 309. 



Pages 293—311 



CHAPTER XXII 

 THE VOLCANIC ROCKS OF VANUA LEVU {continued) 



Basic pitchstones and basic glasses, 312. — Volcanic Agglomerates, 314. — 



Pages 312 — 316 

 b 



