CONTENTS 



Chapteii VI. — continued. 



Miiieralogical Composition of the Gneiss . 

 Classification of the Gneiss .... 



The Epidiorite, Amphibolite and Hornblende-schist Gr 

 Proterobase ........ 



Epidiorite and Amphibolite .... 



Actinolite and Hornblende-schists 



Talc-schist ........ 



The Chemical and Minei'alogical Compositions of the Ej)i 



diorites, Amphibolites and Hornblende-schists 

 Chemical Compositions ..... 



Mineralogical Compositions .... 



Classification of the Epidiorites, Amphiliolites and Hornblende 



schists ....... 



Contents of Gold of the Epidiorites, Amjjhibolites and Horn 



blende-schists ...... 



Chapter VII. — Tlie Petrographij of the Quartz-2}oij>hyry, Granophyre 



Porphyrites and allied Rocks 

 Quartz-porphyry ........ 



Quartz-porphyrite ........ 



Granophyre .......... 



Feldspar-porphyrite ........ 



Augite-25orj)hyrite ........ 



Horn bleude-porphy rite ....... 



Felsite . . .' 



Tuffs 



Porphyroids, .Seririte and Chlorite-schists .... 

 Schists from Quartz-porphyry, Granopliyre and Quartz 



porphyrite ......... 



Schists from Feldspar-porphyrite, Pegmatite and Felsite 

 Chlorite and Chloritoid Schists ...... 



Quartz-schist ......... 



The Chemical and Mineralogical (Compositions of the Quartz 



porphyry, Granophyre, Porphyrites and allied Rocks 

 Contents of Gold of the Quartz-porjihyr}', Granophyre 



Porphyrites and allied Eocks . 

 Mineralogical Composition ..... 

 Classification of the Quartz-porphyry, Granophyre, Porphyrites 



and allied Rocks ..... 

 Origin of the Quartz-porjjhyry, Gianophyi'e, Pori^hyrites and 



allied Rocks ...... 



Chapter VIII. — The Petr(ifjraj)]ii/ of the Granitic Rocks 



Aplite 



Muscovite-grajiite ...... 



Granite 



Grey Granitite ....... 



Pink to Red Granitite ..... 



Hornblende-granitite ...... 



Augite-granitite ....... 



Basic Secretions in the Granitites 



Inclusions in the Gi'anitites .... 



Quaitz-mica-diorite ...... 



Quartz-dioiite ....... 



Diorite ......... 



