Granites, Grano 

 phyres, &c. 



Fel sites, Rhyo- 

 lites, &c. 



Pitch stone. 



Trachytes, 



Andesites (Por- 

 phyrites). 



Gabbros. 



*•*****• -x-* *** * 



Dolerites, Ba- 

 salts (Dia- 

 bases). 



Picrites and 

 highly basic 

 lavas. 



basic. 



