CONTENTS. 



INTRODUCTION. 

 Part I.— PETROGRAPHY OF THE SERIES. 



Chapter I.-PREVIOUS DESCRIPTIONS— Page 



Benza, Allardyce, Ouchterlony, Geological Survey 



Officers 119— 121 



Chapter II.-DISTINGUISHING FEATURES OF THE 

 SERIES— 



Consanguinity of the members; Macroscopic 

 characters ; microscopic characters ; charac- 

 teristic constituents ...... 122—127 



Chapter III.— NOMENCLATURE— 



Pyroxene-granulite ; pyroxene-gneiss ; charnock'te 

 series ; classification by petrographical provinces . 128 — 132 



Chapter IV.-DESCRIPTION OF THE CHIEF TYPES— 



Acid division : charnockite ; leptynite ; quartz- 

 felspar contemporaneous veins. 



Intermediate division . 



Basic division : augitic, hornblendic and garnet- 

 iferous norites. 



Ultra-basic division : pyroxenites and hornblend- 

 es 133— 170 



Chapter V.-DESCRIPTION OF THE CHIEF EXPOSURES- 



The type masses near Madras ; the Seven Pagodas ; 

 South Arcot District ; Salem ; Coimbatore; the 

 Nilgiris; Coorg ; Madura and Tinnevelli . . 171 — 191 



Chapter VI— GuNERAL CONSIDERATIONS— 



Prevalence of magnesian minerals . , . 192 



Preservation of ancient pyroxenic rocks . . 193 



Superficial nature of subaerial decomposition . 197 



