90 



The minerals orthoclase and nephelite, appearing in the 

 norm, are absent in the rock. 



Felspars F. .. 

 Lenads L. 

 Pyroxene P. .. 

 Olivine O. 

 Mag. and Ilm 

 Apatite A. .. 



Classification. 



- 43-28 

 ^ 7-67 



= 22-07 



= 19-25 

 M. = 5-89 

 = 1-24 



5095 = Salic. 



48-45 = Femic. 



Sal 





Fem 





" 48-45 





L 





7-67 





F 





~ 43-28 



K, 



+ Na, 







72 





CaO 





- 69 





K, 





16 



50-95 



Na, O 



56 



=-- Class III. Salfemane 



< f > T = Order 6 PoHugare 



< I > T = Rang. 3 Limhurgase 



< t > T = Sub-rang. 4 Limhurgase 



Chemical Diagroms. 



To facilitate the comprehension of the chemical analysis 

 the following graphical constructions have been employed by 

 the author. They are respectively the Brogger and Miigge 

 diagrams. 



THE 3K0GGER DIAGRAM. 



