TiO z 

 MnO 



p 2 o 5 



co 2 . 



s ... 



METROLOGY 



North 

 I 

 0.08 



dike 

 Ifl 



.001 

 .010 

 .001 



South dike 



II Ila 



0.20 .003 



0.68 



0.56 .008 



0.07 



0.11 .001 



0.03 



0.95 





0.17 .006 



317 



100.11 



100.57 



I. Nepheline syenite from Glick farm, 4 miles east of Mount Solon, Augusta 

 County, Virginia. J. Wilbur Watson, analyst. 



la. Molecular ratios from I. 



II. Nepheline syenite from property adjoining the Charles Curry farm, 5 

 miles southeast of Mount Solon, Augusta County, Virginia. J. G. Dinwiddie, 

 analyst. 



Ila. Molecular ratios from II. 



The norms computed from the chemical analyses in columns I and II 

 of the table above and the position of the rocks in the quantitative svstem 

 are expressed as follows : 



North Dike (I) 



Ratios 



Sal 90 35 



17.8= 1, persalane. 





Norm 



Or.. 



29 47] 



Ab. 



.... 35.63 



An. 



.... 1.11 



Ne.. 



.... 24.14j 



01.. 



.... 0.411 



Di.. 



0.46 



Mt.. 



3.71 



11... 



... 0.15 



Ap. 



.... 0.34, 



H 7 



4.78 



CO,. 



.... 0.03 



Class, — — = — 

 90.35 ' Fern 5.07 



L 24.14 

 Order, - = — - = 0. 36 = 6, 



F 66 21 



K 2 4- Na. 2 206 



russare. 



5.07 Rang, 



Subrang. 



CaO 

 K 2 Q 

 Na 2 



= 515 = 1, miaskase. 



53 



153 



= — = 0.34 = 4, miaskose. 



100.23 





Norm 



Or.. 



.... 30.021 



Ab. 



.... 25.68 



An . 



.... 0.56 ( 



Ne.. 



.... 32.94, 



01.. 



— ^ 



Di.. 



.... 4.18 



Wo. 



0.46 



Mt.. 



.... 1.39 



11... 



0.46 



Ap. 



.... 0.34 



Pr.. 



0.34 



H ? 



.... 3.40" 



C0 2 . 



0.95 



89.20 



7.17 



Class, 



South Dike {II) 



Ratios 



Sal 89.20 



Order, — = 



Fem 7.17 

 L_ 32.94 

 F~ 



12.4 = 1', persalane. 



Rang, 



56.26 

 f Na 2 



0.58 = 6, russare. 



CaO 



K 2 

 Subrang, Tr—p.= 



Na 2 



j>4 

 165 



219 



= 109= 1, miaskase. 



z 



= 0.32 = 4, miaskose. 





100.72 





No. 



Symbol 



Name 



I 

 II 



I. 6. 1. 4. 

 I. 6(7). 1. 4. 



Miaskose. 

 Laugenose-Miaskose 



