798 



DEPARTMENT OF THE INTERIOR 



2 GEORGE V., A. 1912 



_ 



Skagit Range. 



Rocky Mountain System. 





® A 



CO -C 









CD 





CD 





— 



ID CO 



eg -B 



o5 

 'a 



Orthoclase-bearing 

 dolomite, Water- 

 ton formation. 



Silicious dolomite, 

 middle Altyn, 

 Clarke range. 



CD OS 



olomite, 



Ityn, 



ange. 



olomite, 

 Ityn, 

 aid rang 



CO >, 



ft 00 & 



2 CD ri 





Quartz die 

 of Chilli 

 olith. 



Soda grar 

 of Chilli 

 olith. 



c« 

 u 



s 



Silicious d 

 lower A) 

 range. 



Silicious d 

 upper A 

 Clarke r 



Silicious d 

 upper A 

 MacDon 



Silicious n 

 liineston 

 Clarke r 





7 



30 



201 



1338 



1320 



1322 



1326 

 25 50 



1270 



1306 



SiO-2 



60 36 



71 41 



7124 



30 46 



18-89 



13 46 



26-07 



35-58 



Ti0 2 



17 



70 

 23 



•34 



14-38 



•42 

 1411 















AI2O3 



6 86 



■49 



1-56 



225 



392 



3 40 



Fe 2 3 



1 

 3 



93 

 74 



1 33 

 117 



1-75 

 1-23 



4'53 



189 



•72 



105 



•48 



■62 



•38 



2 08 

 268 



1 56 



FeO 



0-87 



MnO 



3 



14 

 66 



•04 

 113 



tr. 

 107 















MgO 



10 07 



16 79 



17-81 



1477 



12 99 



10 09 



CaO 



6 07 



251 



2-87 



16 02 



23 86 



25-08 



2165 



19 58 



1972 



SrO . . . 





















BaO . 





03 

 412 



297 



09 

 237 

 3-97 















Na 2 



358 

 174 



•87 

 571 



•47 



•57 



•28 



108 



•86 



1-27 



104 

 140 



051 



KjO 



121 



H,0- 



06 



•09 



11 



11 



•18 



04 



12 



04 



17 



H 2 + 



•55 



•30 



■59 



131 



157 



123 



■42 



1-52 



293 



P 2 6 



11 



13 



17 















c 













03 



C0 2 



•08 



•12 



•28 



2255 



36 89 



38 08 



32 03 



29 14 



23 80 





99 95 



100 07 



100 27 



100 38 



100 43 



100 15 



99 87 



100 46 



99 87 



Sp.gr 



2-757 



2-653 



2 651 



2-749 



2 802 



2 805 



2 768 



2 816 



2 741 





536 



537 



527 



53 



60 



58 



61 



99 



75 



