692 



DEPARTMENT OF THE INTERIOR 



GROUP XIII. 



2 GEORGE V., A. 1912 





Effusives. 



_ 



81 



82 



83 



84 



85 



86 



87 





^H 1 



'S 

 £ 





"5" 



a 



"a" 



s 



'Si 

 



43 



GO 







w 







BQ 



O 



e3 

 go 



O 



0> 



to 



O 



eg 



CD 



<5 . 



c3 



pq 



0) . 





goto 



5 



s 



'Si 



a 



"a 

 



'Si 







u 



es 



c 



» a 



§6 



. ^ OQ 







CS --- 



C3 













M 



tt 



PQ 



CQ 



< 



ij 



3 



No. of Analyses. 



10 



11 



4 



8 



5 



2 



6 



Si0 2 



74 04 



48 36 



52 04 



53 56 



50 11 



47 45 



36 19 



Ti0 2 ..., 





18 





66 





76 





82 





96 





81 



7 



11 



A1 2 3 



13 

 1 

 1 



1 



19 

 35 

 01 

 04 

 32 

 19 



15 



6 

 10 



4 

 8 



40 

 48 

 07 

 80 

 19 

 69 



17 

 4 



2 



3 



5 



65 

 66 

 75 

 13 

 33 

 11 



17 

 4 

 3 



3 

 6 



88 

 51 

 05 

 07 

 62 

 45 



13 

 4 

 3 



9 



7 



04 

 58 

 94 

 11 

 27 

 63 



11 

 3 

 5 



14 



8 



43 

 22 

 78 

 12 

 60 

 18 



10 

 8 

 5 



5? 



Fe 2 3 



48i 



FeO 



97 



MnO 





MgO 



14 

 9 



59 



CaO 



88 



Na 2 



3 



88 



3 



34 



4 



10 



3 



41 



1 



94 



2 



32 



3 



28 



K 2 



3 



75 



1 



30 



5 



03 



3 



76 



4 



15 



2 



99 



2 



03 



H 2 ; 



1 



02 2 





43 



3 



74 



2 



32 



3 



58 



2 



50 



1 



94* 



P 2 6 



•03 



•28 



•70 



•55 



•69 



•60 



01 



Calculated as Water-free. 



Si0 2 



74 



13 

 1 

 1 



1 

 3 

 3 



80 

 18 

 33 

 37 

 02 

 04 

 32 

 20 

 92 

 79 

 03 



48 



15 



6 



10 



4 

 8 

 3 

 1 



57 

 66 

 47 

 51 

 11 

 80 

 21 

 73 

 35 

 31 

 918 



54 



18 

 4 

 2 



3 

 5 

 4 

 5 



06 

 79 

 34 

 84 

 85 

 14 

 46 

 31 

 26 

 22 

 73 



54 



18 

 4 

 3 



3 

 6 

 3 

 3 



84 

 84 

 31 

 62 

 12 

 07 

 70 

 60 

 49 

 85 

 56 



51 

 1 



13 

 4 

 4 



9 

 7 

 2 

 4 



97 

 00 

 52 

 74 

 08 

 12 

 62 

 91 

 01 

 31 

 72 



48 



11 

 3 



5 



14 



8 

 2 

 3 



67 

 83 

 73 

 30 

 93 

 12 

 97 

 39 

 38 

 06 

 691 



36 

 V 



10 

 8 

 6 



90 



Ti0 2 



A1 2 3 



25 

 73 



Fe 2 3 



FeO 



MnO. 



65 4 

 09 



MgO 



CaO 



14 



10 



3 



2 



88 

 08 



Na 2 



K 2 



P 2 6 



34 



07 

 01 

































Each sum = 100 00. 1 Includes 2 85% Cr 2 3 . 2 Includes "02% Li 2 and 23% S0 3 . 

 ignition. 4 Includes 2 47% Cr 2 3 . 



3 Loss on 



