ORIGIN OF ERUPTIVE AND PRIMARY ROCKS. 



547 



3TAMB. 



Calcareous Diabase. 



Gabbro. 



Hypersthenite. 



Augite-rock, 

 Norite. 



Diorite. 

 Globular Diorite. 



Micaceous do. 



Hornblende rock. 

 Hornblende-slate. 

 Actynolite slate. 

 Kersanton. 

 Eklogit. 

 Disthene rock. 



Aphanite. 

 Serpentine. 

 Schiller rock. 



Garnet rock. 

 Eulysite. 



Hpidosite. 



Labrador rock. 



ESSENTIAL CONSTITUENTS, 



Augite,Labradorite or ( 

 Oliproclase & Calcite. / 



TEXTURE. 



Granular impalpable, 

 slaty concretionary. 



S Granular, slaty and 

 concretionary. 

 Granular. 



Granular to impalpable. 



Diallage or Smarag- 

 dite with Labrado- 

 rite and Saussurite. 

 Hypersthene and 



Labradorite. 

 Augite. 

 f Hornblende and Felds- "j 

 ^ par Hypersthene and }- Granular. 

 I Feldspar. J 



Hornblende and Albite Granular, slaty. 

 Hornblende and Granular and globular 



Anorthite. 



C Hornblende, Oligoclase.g u 



# Orthoclase and Mica. 



Hornblende. 

 Hornblende, 

 Actynolite. 

 Horblende and Mica'. 



Granular or impalpable. 



Slaty. 



Slaty. 



Granular. 



Smaragdite and Garnet. Granular, slaty. 

 Disthene with Garnet Granular, slaty, 

 and Mica. 



Feldspar and Pyroxene C Im P al P able > porphyri- 

 < tic. slaty, cellular, 



or Amphibole 

 Serpentine. 



Ser- 



Schiilerspar and 



pentine. 

 Garnet, Hornblende, 



and Magnetite. 

 Garnet, Pyroxene, 



and iron oxide. 

 Pistazite and Quartz. 



Labradorite and 

 Hornblende. 



C amygdaloidal. 

 Impalpable, porphyri 



tic slaty. 

 Granular. 



• Granular. 

 Granular, 



impalpable, 



Granular, impalpable 



concretionary. 

 Granular, porphyritic. 



Fragmentary rocJcs of the Greenstone and Melaphyre class.* 

 Greenstone conglomerate and greenstone breccia. 

 Greenstone sandstone (psammite.) 

 Greenstone tuff. 

 Schalstone. 



It will be observed from the foregoing tables, that by the 

 action of water on the porphyries and greenstoues rocks have 

 * Naumann, Lehrbuch^ I, 70S. 



