SOME UNUSUAL ROCKS FROM MAINE 



179 



SiOo 



Al,03 



Fe^Os 



FeO . , 



MgO 



CaO 



Na^O 



K,0 



H2O+ 



H,0 - 



TiO^ 



P2O5 



MnO- 



ZrO 



CO. 



BaO & SrO . 

 V2O, & NiO. 



Total 100. 14 



Prowersose from* 

 Knox Co., Maine 



076 

 223 

 100 

 026 



52.260 

 10.630. 



2.47 



5-45o 



9.320 



5.62 



1 .60 



5.990. 



1.97 



1.92 0-024 



0.98 0-007 



O. 12 o -002 

 0.08 o-ooi 



0-7S 



Prowersose fromf 



Two Buttes, Prowers 



County, Colo. 



840 



035 

 043 

 217 

 127 

 016 



50.41 o 

 12.270 



5-7io 



3.060 



8.690 



7.080 



0.970 



7-53o 



1.80 



0.46 



I-47o-oi8 



0.46 0-003 



O - 15 o • 002 



0.29 

 0.07 



100. 42 



* Analysis by George Steiger, Laboratory of U. S. Geological Survey 

 t Analysis by W. F. Hillebrand, Laboratory of U. S. Geological Survey. 



NORM OF PROWERSOSE FROM KNOX COUNTY, MAINE, 



CALCULATED FROM THE ANALYSIS 



Orthoclase . 



Albite . . . 



Anorthite . . 



Diopside . . 



Olivine . . 

 Hypersthene 

 Magnetite 



Ilmenite . . 



Apatite . . . 



Zircon . . . 



Water . . . 

 Carbon dioxide 



Total . , 



35.58% 

 13.62 



3-89 

 13.90 



4.91 

 15.04 



3-48 



3-65 



2-35 



0.18 



2-95 



0-7S 



100.27 



Class, :|^-^^^^ = <^>^ = III, Salfemane. 

 Fem. 43.51 3 5 



Order, 



Q o 



53-^-9 



<-r' 



Gallare. 



Rang, — — =^<l>^ = 2 , domalkalic, Kilauase. 



LaO 14 I 3 



c, , K2O 64 7 5 , . „ 



bubrang, i- — — = —;<-> ^ = 2, dopotassic, Prowersose. 

 NajO 26 I s 



