694 



DEPARTMENT OF THE INTERIOR 



GROUP XV. 



2 GEORGE V., A. 1912 











DlKE- 



ROCKS. 









93 



94 



95 



96 



97 



98 





TJ 



a 









T3 













q 



a 





c3 



5-s 



02 CO 



"a 



c3 



c3 



c3 





a 



DO 

 O 



si 



O 



O 



<D 



O 



a) 



S a 



c8 



Sg 1 









a) 

 "oa 



S 

 O 



ft 



a 1 







I 3 



eS 



be 

 



£ 







|£ 





§ 



M 



> 



4 



O 



§ 



<3 



No. f Analyses. 



10 



20 



15 



16 



6 



Si0 2 



49 45 



50-79 



52-62 



40 70 



45-17 



32 31 



Ti0 2 



1 



14 

 3 



23 

 41 

 39 



1 

 15 



3 



02 

 26 

 29 



14 

 3 



54 

 86 

 60 



3 



16 



5 



86 

 02 

 43 



1 

 14 



5 



90 



78 

 10 



1 

 9 

 5 



41 



AI2O3 



50 



Fe 2 3 



42 



FeO 



5 



01 

 13 



5 



54 



07 



4 



18 

 84 



7 



84 

 16 



5 



05 

 35 



6 



34 



MnO 



01 



MgO 



8 



26 



6 



33 



8 



55 



5 



43 



6 



26 



17 



43 



CaO 



6 



73 



5 



73 



5 



86 



9 



36 



11 



06 



13 



58 



Na 2 



2 



54 



3 



12 



3 



21 



3 



23 



3 



69 



1 



42 



K 2 



4 

 3 

 1 



69 

 04i 

 19! 



2 

 5 



79 



71 2 



35 



2 

 2 



83 

 70 

 21 



1 

 5 



76 

 59 3 

 f>9, 



2 

 3 



73 

 40 

 51 



2 

 7 

 2 



70 



H 2 



50-» 



P 2 6 



38 





























Calculated as Wateb-fbke. 



Si0 2 . 

 Ti0 2 . 

 A1 2 3 

 Fe 2 3 

 FeO. 

 MnO 

 MgO 

 CaO. 

 NasO 

 K 2 0. 

 P2O5. 



50 99 



•27 

 ■86 

 •50 



17 

 •13 



53 

 •95 

 ■62 

 •84 



14 



53 87 

 1-08 



54 



•08 



43 



•56 



4 



•23 



16 



•70 



5 



29 



8 



•86 





79 



5 



02 



9 



•30 



3 



90 



1- 



22 





•76 



34' 



•96 



1- 



•30 



io- 



•28 



5 



•23 



6' 



•36 



• 



•48 



18- 



45 



14- 



82 



1- 



83 



2- 



53 



2- 



■93 



•52 

 •27 



86 

 ■85 



01 

 •84 

 •68 

 •53 

 •92 

 •59 



Each sum =100. 00 » Includes 61% C0 2 . 2 Includes 261% C0 2 . 3 Includes 2 97% C0 2 . 4 In 

 eludes 4 35% COj. 



