412 H S. WASHINGTON — IGNEOUS COMPLKX OF MAGNET COVE 



Table III. — Comparison of 





I. 



II. 



III. 



IV. V. 



VI. 



VII. 



VIII. 



SiO a 



60.03 

 20.76 

 4.01 

 0.75 

 0.80 

 2.62 

 5.96 

 5.48 

 0.59 



59.70 



18.85 

 4.85 



0.68 

 1.34 

 6.29 



5.97 

 1.88 



63.71 



16.59 

 2.92 

 0.66 

 0.90 

 3.11 

 8.26 

 2.79 

 0.19 

 0.86 



54.14 

 20.61 

 3.28 

 2.08 

 0.83 

 1.85 

 9.87 

 5.25 

 0.40 

 0.95 

 0.92 

 0.25 



46.63 

 15.03 

 5.91 

 5.09 

 3.47 

 11.23 

 8.16 

 1.96 

 0.35 

 1.12 



42.79 

 19.89 

 4.39 

 2.33 

 1.87 

 11.76 

 9.31 

 1.67 

 0.99 

 1.70 



45.64 

 19.50 

 3.47 

 3.34 

 3.04 

 445 

 11.57 

 6.96 

 0.16 

 2.44 



45.28 

 27.37 

 3.53 

 0.49 

 0.33 

 1.22 

 17.29 

 3.51 

 0.40 



A1 2 



Fe,O a 



FeO 



MgO 



CaO 



Na 2 0. ■••••' 



K 2 



H 2 



TiO, 



Zr0 2 







MnO 



Trace. 





0.20 



Trace. 



0.41 

 1.70 



0.19 



0.19 



P,0, 



0.07 





CI 







0.12 





























101.07 



99.56 



100.19 



100.55 



98.95 



98.81 



100.76 



99.53 



I. Pulaskite, Fourche mountain, Arkansas; Brackett, analyst. Williams: Op. 

 cit., p. 70. 



II. Nepheline-syenite, Fourche mountain, Arkansas ; Noyes, analyst. Williams : 

 Op. cit., p. 81. 



III. Umptekite, Umpjavr, Umptek ; Petersson, analyst. Ramsay: Fennia, vol. 

 xi, 1894, p. 205. 



IV. Nepheline-syenite (main type), Tschasnatschorr, Umptek. Ramsay: Fennia, 

 vol. xi, 1894, p. 132. 



V. Ijolite, Kaljok valley, Umptek ; Berghell, analyst. Ramsay : Op. cit., p. 185. 



VI. Ijolite, liwaara, Umptek; Berghell, analyst. Ramsay: Op. cit., p. 185. 



VII. Nepheline-porphyry, Wudjavrtschorr, Umptek; Hackmann, analyst. Ram- 

 say : Op. cit., p. 151. 



VIII. Urtite, Lujavr Urt, Kola; Sahlbom, analyst. Ramsay: Geol. For. Forh- 

 Stock., vol. xviii, 1896, p. 462. 



IX. Pulaskite, Moita, Foia, Portugal ; Dittrich, analyst. Koschlau and Hack- 

 mann: Tsch. Min. Pet. Mitth., vol. xvi, 1896, p. 225. 



X. Foyaite, Picota, Portugal; Jannasch, analyst. Koschlau: Op. cit., p. 218. 



