THE PETROGRAPHY OF JAVA AND CELEBES 

 Norms of the Rocks Analyzed 



241 





II 



12 



13 



14 



15 



16 



17 



18 



19 



20 



Q 



















133 

 17.8 

 36.2 

 16.4 



6 8 



Or 



Ab 



51-7 



25-7 



8.6 



S-4 



40.0 



351 



8.3 



II. I 



54-5 



14-7 



8.1 



16.5 



26.1 



26.7 



9-4 



10.5 



20.0 



3-1 



26.4 



4.8 



o-S 



24-5 



25.0 



15.6 



9-4 

 26.4 



1-4 



8.3 

 27-3 

 28.1 



An 



Ne 



12.8 

 5.9 

 4-4 



12. 2 

 7-4 

 3-1 



Lc 







HI 







0-5 





0.2 





C 





0.4 











Di 



Hy 



1.8 



0-5 



6.6 



22.0 



24.7 



23.0 



295 



2.1 



7-7 



7.0 

 12.9 



01 



2.6 



I.O 



1.9 



0.9 

 1.9 



IO-5 

 30 



12.5 

 3-5 



11.9 



51 



17-3 

 5.1 



4-9 

 6.0 



Mt 



Hm 



3-7 



6.0 



11 



Fl 



I.I 



0.3 



0.8 



2.7 



3-2 



4-3 

 0-3 

 4-4 



4.3 



1.8 



1-5 



1-7 



Ap 



0-3 





03 



2.7 



2.0 





1-3 



1 .0 



0.7 



II. 



12. 



Maros. 



13- 

 Morley. 



14. 



IS- 

 Morley. 



16. 



17- 



1 8, 



19. 



20. 



Trachyte, pulaskose, I'. 5. '2. '3. Gentungen, Pic de Maros. E. W. Morley. 



Sodalite trachyte, laurvikose-pulaskose, I. s (6). (i) 2. 3 (4). Road at S. W. base of Pic de 



E. W. Morley. 



Nephelite syenite, beemerose-procenose, I. '6. (i) 2. 3. Gentungen, Pic de Maros. E. W. 



Fergusite, — II. 6. 3. 2'. Gentungen, Pic de Maros. E. W. Morley. 



Biotite kentallenite, ourose-kentallenose, III. s (6), 3 (4). '3. Gentungen, Pic de Maros. 



E. W. 



Marosite, kajanose-ottajanose, III. 6. (2) 3. 2. Gentungen, Pic de Maros. E. W. Morley. 

 Mica-leucite basalt, kajanose, III. 6. 2 (3). 2'. Oeloe Kajan, East Borneo. Pisani and Brouwer. 

 Absarokite, kentallenose — , III. 5.(3) 4. 3. Road at S.W. base of Pic de Maros. E. W. Morley 

 Andesitic pitchstone, dacose, 'II. 4'. 2.' '4. Simaboer, Mesapi, Sumatra. E. W. Morley. 

 Andesite, andose, II. '5. 3'. 4. Rau Rau, Mesapi, Sumatra. E. W. Morley. 



brownish-black mica. In thin section the whitish spots are seen 

 to be microscrystalline aggregations of anhedral alkalic feldspar, 

 apparently orthoclase, and anhedral nephelite. The dark-colored 

 matrix resolves itself into a complex of prismoid and anhedral 

 lime-soda feldspar, augite, somewhat poikilitic biotite, magnetite, 

 and olivine. In places around the areas of pseudoleucite there are 

 clusters of minute anhedrons, having the refractive index of 

 pyroxene, which border small crystals of plagioclase or partly 

 replace them. The chemical composition of this rock is given by 

 analysis No. 14, which belongs in II. 6. 3. 2, and is more calcic, so 

 far as normative feldspars are concerned, than fergusose, II. 6. i. 2. 

 The rock is an equivalent of nephelite monzonite, but has the 

 habit of fergusite. 



Besides the shonkinitic rocks in this region there are various 

 syenitic rocks grading into nephelite syenites and their aphanitic 



