III. 



IV. 



MICRO-PHOTOGEAPHS 



OP 



SECTIONS OF TYPICAL ROCKS. 



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 page 



y I i. Granitite-gneiss | 



{ ii. Hornblende-gi^anitite-giieiss j * ' ' ' * • -y-- 



Tj I i. Epidote-granitite-gueiss \ 



\ ii. Diorite-gneiss j ...... .5-0 



I i. Biotite-schist \ 



( ii. Epidiorite J ' " ' " • ' • • . .3' 



I i. Amphibolite ( 



( ii. Hornblende-schist ) * ' ^'^ 



Y I i- Sei'icite-schist ) 



( ii. Muscovite-granite j ' 



yj I i. Granite y 



{ ii. Hornblende-granitite j ^^ 



VTT t ^- Augite-granitite ( 



^^^- 1 ii. Toualite I 70 



VIII ' !•- I^iorite y 



\ ii. Hornblende-syenite j /-> 



IX. I i: Augite-syenite , 



I 11. Norite j '-^ 



"Y )' i. Fine-grained Diabase \ 



{ ii. Coarse-grained Diabase j 



