536 



OGILVIE 



can readily be distinguished from all other granitic types of the 

 region in that its color tones are all of black and white order. 

 The other granites are pinkish, greenish or brownish in 

 tone. 



Table VI. 





Analysis and Norm of Tonalose ) 



rom Southport. 









Molecular 











Composition. 



Proportions. 





Norm. 





Si0 2 



6.S-44% 



1-057 



Qu 





17-58 



A1 2 0, 



18.84 



.184 



Or 





n.fi8 



Fe 2 0, 



.16 



.OOI 



Ab 





36-I5 



FeO 



4-05 



.056 



An 





19. 18 



MgoO 



I.99 



.049 



Cor 





2-55 



CaO 



4-23 



•075 









Na 2 



4-35 



.069 



Hyp 





9.78 



K 2 



2.07 



.02I 



Mag 





•23 



H 2 + 



•33 





Ilm 





2.74 



H 2 0- 



.06 





Ap 





-67 



C0 2 



none 











TiO, 



1. 41 



.018 









P 2 O s 



•32 



.002 









Total 



101.25 





Microscopic Character. — This rock type is too common to 

 make extended comment desirable. It contains orthoclase, 

 plagioclase, biotite and quartz, in order of abundance, with a 

 little accessory magnetite and apatite and a moderate amount 

 of titanite. 



Metamorphism. — There is evidence of strain, though not of 

 as intense degree as in the case of the Damariscove lassenose. 

 A little undulatory extinction, a few individuals of microcline 

 and considerable cracking of the feldspar are the evidences of it. 

 There is a little kaolin developed along the cracks in the feldspar, 

 and some chlorite borders the biotite. 



The Germanares (II. 5). (Augengneiss ; Monzonite; Gabbro; 

 Anorthosite.) In the Journal of Geology for April and May, 1906, 

 is a paper by Edson S. Bastin on prowersose from Knox County, 

 Maine. The rock I am about to describe appears to be another 

 occurrence of the same type. The points of similarity will be 

 evident on comparison with Mr. Bastin's description. The 

 Boothbay rock is variable in structure, mineralogy and chemical 



