130 DEPARTMENT OF THE INTERIOR 



2 GEORGE V., A. 1912 



from 0-03 mm. to 0-3 mm., with an approximate average of not more than 

 0-i mm. 



Mr. M. F. Connor made the following analysis of a typical specimen (No. 

 1135) of the quartzite, taken near the Boundary monument on the isolated 

 mountain immediately west of the Moyie river: — 



Analysis of Kitchener quartzite. 



Mol. 



1. la. 2. 



SiU 2 76-90 1-282 76-84 



Ti0 2 -35 -004 



A1 2 3 11-25 -111 11-76 



Fe 2 3 -69 -004 -55 



FeO 3-04 -042 2-88 



MnO -02 .... tr. 



MgO 1-01 -025 1-39 



CaO -88 -016 -70 



Na-,0 3-28 -053 2-57 



K 2 1-36 -015 1-62 



H 2 at 110°C -20 ... ) 



H 2 above 110°C 1-20 -067 1-87 



C0 2 tr. ....] 



P 2 6 .. .. -15 -001 



100-33 100-18 



Sp. gr 2-680 



The oxide proportions correspond to about 52 per cent of free quartz. It 

 is difficult to calculate for the other constituents, largely because the exact 

 distribution of the alkalies is not known. If all the soda be assigned to the 

 albite molecule, this feldspar would make up nearly 28 per cent of the rock. 

 From the great excess of alumina, over that required to form the normal feld- 

 spar molecules from all of the potash, soda, and lime present, it appears 

 almost certainly necessary to believe that the paragonite molecule is repre- 

 sented in relatively large amount. The excess of alumina, a notable fraction 

 of the very high soda and a fraction of the high combined water can all be 

 satisfactorily assigned on that supposition. Whether the paragonite exists in 

 the free state or is in isomorphic mixture with the analogous potash molecule 

 of sericite, cannot be readily determined. The excess of soda over potash is 

 also characteristic of the two type analyses of the Creston formation; all three 

 analyses are thus in contrast to the average analysis of sandstones or argillitic 

 rocks generally, in which potash is certainly the more abundant oxide of the 

 two. The microscopic evidence is against the view that the dominance of the 

 soda is due to a corresponding abundance of albite or other plagioclase. It 

 may be added that the analysis was most carefully made, a second complete 

 determination of the alkalies agreeing very closely with the first. 



The hypothesis that much of the mica is paragonite or a highly paragon- 

 itic muscovite, renders the analysis more clearly understood, but it complicates 

 the calculation. Assigning ten molecules of potash to orthoclase, five mole- 

 cules to sericite, ten molecules of lime to anorthite and six to epidote — propor- 



