684 



DEPARTMENT OF THE INTERIOR 



GROUP V. 



2 GEORGE V., A. 1912 



' 



Pl. 



Ef. 



Plutonics. 



Effusives. 





28 



29 



30 



31 



32 



33 



34 



35 



36 



37 





■ 

 a 



a 



C 

 o3 



N 



N 









a 







ec 



03 



H 

 c3 









< 















13 



3 

















W 



a 



& 



c 





a 



a 





<D 







a 





a 









03 



O 







a 

 O 





c3 

 w 



O 



bp 



'5 s 



be 



^ 5 



s 

 a 



c3 



00 

 O 



03 

 4a 



O 



"go 



03 



c 





d 



03 



O 





09 



d 

 d 



eS 



03^. 



.15 d 



b 



£2 



C 00 



SO 



g JO 



so 



'to 



13 



03 



^ 03 

 03 00 



03 

 "oQ 





I- 1 — i 



.So" 

 ^•^ 



go 



03 



.15 S 



• - 6£ 



P.S 



3"* 



s> 



jf"E 

 .13 



.2 



■T5.2 



.2P 



00 



S 

 < 



d 

 <! 



0j 

 -^> 



'Sc 

 s 



03 • 



/- s 



"CO 



c - — ■ 

 oj 03 



C CO 

 g 03 



CO 



e 

 < 



c3 

 O 





O 



P 



0> 



P 



P 



< 



<4 



w 



M 



£ 



No. of Analyses. 



12 



30 



20 



89 



70 



87 



33 



20 



24 



10 



Si0 2 



65 10 



66 91 



59 47 



58 38 



56-77 

 •84 



59 "50 



57 50 

 •79 



59-48 



61 12 



62 25 



Ti0 2 





54 





33 





64 





80 





77 





48 





42 



1 



65 



AI2O3 



15 

 1 



2 



82 

 64 

 66 

 05 



16 

 2 

 1 



62 

 44 

 33 

 04 



16 



2 

 4 



52 

 63 

 11 

 08 



16 

 2 

 4 



28 

 98 

 11 

 13 



16 "67 



316 



440 



13 



17 

 3 

 3 



31 

 33 

 13 



18 



17 33 



378 



362 



"22 



17 

 2 

 3 



38 

 96 

 67 

 15 



17 



2 



2 



65 

 89 

 40 

 15 



16 

 3 



2 



10 



Fe 2 3 



6? 



FeO 



?0 



MnO 



21 



MgO 



2 



17 



1 



22 



3 



75 



3 



88 



4-17 



2 



75 



2'86 



3 



28 



2 



44 



2 



03 



CaO 



4 

 3 

 2 



66 



82 

 29 



3 

 4 

 2 



27 

 13 

 50 



6 

 2 

 1 



24 

 98 

 93 



6 

 3 



2 



38 

 34 

 09 



674 

 3 39 

 212 





 3 

 2 



80 

 58 

 04 



5 83 

 353 

 2 36 



6 

 3 

 1 



61 

 41 

 64 



5 

 3 



1 



80 

 83 



72 



4 

 3 



2 



05 



Na 2 



55 



K 2 



44 



H 2 



1 



09 

 16 



1 



13 



08 



1 



39 

 ?6 



1 



37 

 96 



136 

 •25 



1 



26 

 ?6 



1-88 

 30 





74 



90 



1 



43 

 15 



1 



50 



P 2 6 



40 





































Calculated as Water-free. 



Si0 2 .. 

 Ti0 2 . 

 A1 2 3 

 Fe 2 3 

 FeO. 

 MnO 

 MgO 

 CaO. 

 Na 2 0, 

 K 2 0. 

 P 9 6 . 



65-82 



67 67 



60 



31 



59 19 



57 



56 



60 



35 



58 



65 



59 "92 



62 01 



"55 



33 





65 



•81 





85 





78 





80 



"48 



•43 



15-99 



1681 



16 



75 



16 51 



16 



90 



17 



54 



17 



67 



17 51 



17-91 



166 



2 47 



2 



67 



3 02 



3 



20 



3 



37 



3 



85 



298 



293 



269 



135 



4 



17 



417 



4 



46 



3 



17 



3 



69 



370 



2 44 



•05 



04 





08 



13 





13 





18 





22 



■15 



15 



219 



123 



3 



80 



3.93 



4 



23 



2 



78 



2 



90 



331 



2"48 



471 



331 



6 



33 



647 



6 



83 



5 



87 



5 



92 



6 66 



5-88 



3 86 



418 



3 



02 



3 39 



3 



44 



3 



63 



3 



60 



3 "44 



3-88 



2 32 



2 53 



1 



96 



2"12 



2 



15 



2 



07 



2 



40 



165 



174 



16 



•08 





26 



26 





25 





26 





30 



•20 



15 



63 20 

 167 



16-35 

 367 

 2 23 

 •21 

 2-06 

 411 

 361 

 2 '48 

 41 



Each sum = 100 00. 



