REPORT OF TEE CHIEF ASTROyOMER 



169 



SESSIONAL PAPER No. 25a 



Table III. — Showing composition of equivalent formations. 





1. 



Kitchener ; 

 western 

 phase. 



2. 



Siyeh of Galton 



series ; mean of 



two analyses. 



3. 



Siyeh of Lewis 



- 



series ; mean of 

 two analyses. 



SiO« 



TiO., 



76 90 



•35 

 1125 



•69 

 304 



•02 

 101 



•88 

 328 

 136 



•20 

 120 

 .•15 



36-80 



32 57 



A1 2 3 



Fe 2 3 



5-92 

 1-40 



•85 



3-91 

 1'47 



FeO 



115 



MnO 





MgO 



6-38 



21 03 



76 



1.68 



•23 



249 



8-98 



CaO 



22 53 



Na 2 



K,0 



H 2 0- 



H 2 0-f- 



P 2 5 



C 



•51 



1-15 



12 



2-48 



•08 

 22 71 



03 



C0 2 



tr. 



25 16 





100 33 



100-33 



100 06 



Sp.gr 



2 680 



2 748 



2-741 



Table IV. shows the similar contrasts between the western and eastern 

 phases of the Creston formation when compared with each other and with the 

 synchronous Altyn formation of the Galton and Clarke ranges. Cols. 1 and 4 

 refer to specimens collected at points about 100 miles apart. 



Table IV. — Showing composition of equivalent formations. 





1. 



Creston, western 

 phase. 



2. 



Creston, eastern 

 phase. 



3. 



Upper Altyn of 

 Galton series. 



4. 



Altyn of Lewis 





series ; mean of 

 three analyses. 



Si0 2 



82-10 

 ■40 



8-86 

 •49 



1-38 

 •03 

 •56 

 •82 



2-51 



241 

 ■05 

 •37 

 •04 



5165 



26-07 



19-28 



TiO, 





A1 2 3 



7-85 



1-74 



•98 



392 

 2-08 

 2-68 



143 



Fe 2 0, 



FeO 



•80 

 ■43 



MnO 





MgO 



367 

 15 02 

 269 

 1-38 

 09 

 1-81 



13-05 



12-99 



19-58 



1-04 



140 



•04 



T52 



16 46 



CaO .. 



Xa„0 



23-53 

 •54 



K 2 



H 2 0- 



•97 

 •11 



H 2 0+ 



PjO-... . 



107 



co 2 



29-14 



35-67 











100 02 



99 93 



100 46 



100-29 



Sp.gr 



2 681 



2 644 



2-816 



2-792 



