ADDITIONAL COMMENTS ON THE GEOLOGY OF THE JUAN FERNANDEZ ISLANDS 85 



Norms. 



Q 



C . 



or 



ab 



an 



ne 



di 



hy 



ol 



ap 



il . 



ml 



hm 



cm 



sal. 



fern 



II 



8.08 

 18.14 

 23.48 



6.76 

 21.78 



10.46 

 0.74 

 6.62 

 4.01 



56.39 

 4361 



0.14 



5-23 

 25.22 

 29.71 



17-39 

 6.28 



0.71 

 7.30 

 8.03 



60.30 

 3971 



III 



0.40 



3.84 

 20.19 

 24.81 



19.32 

 16.84 



0.71 

 5-93 

 7-97 



49.24 



50.77 



IV 



V 



VI 



VII 



4.25 



4.06 



22.39 

 31.29 



16.00 



7.50 



0.87 

 6.62 



7.02 



61.99 

 38.01 



0.66 

 2.17 



24.12 



32.49 



7-43 

 19.20 



I.I I 

 6.27 

 6.34 



59-44 

 40.35 



3-45 

 1 1.22 



15-47 



6.65 

 3-51 

 53-07 

 0.44 

 1.96 

 421 



30.14 

 69.84 



1-99 

 4.56 



22.33 

 29.62 



23.40 

 1.58 

 0.67 

 5.28 



10.37 



0.20 

 58.50 

 41.50 



Quantitative system. 



16.14:36.55 : 47.31 

 8.69:41.92:49.39 

 7.86 : 41.34: 50.80 

 7.03:38.78:54.19 

 3.69:41.03: 55.28 



11.44:37.23: 51.33 

 8.07:39.51 : 52.42 



25.91 : 65.88: 8.21 



Niggli values. 



4-49 



0.79 



22.48 



57.15 

 7.12 



3-43 



0.45 



0.53 

 2.78 

 0.86 



91-93 

 8.05 



si . . 

 qz . 

 al .. 

 f m . 

 c , . 

 alk 

 c/fm 

 ti . . 



P •- 

 k . 

 mg. 

 o. . . 

 w . 



103.7 



-35-5 

 21.2 

 43-6 

 25.4 

 9.8 

 0.58 

 5.88 

 0.30 

 0.20 

 0.50 



O.II 



0.21 



1 10.4 



-22.4 



23-3 

 41.2 



27.3 

 8.2 

 0.66 

 6.83 

 0.30 

 0.16 

 0.40 

 0.24 

 0.40 



III 



105. 1 



-18.9 



17.8 



51-9 



24.3 



6.0 



0.47 

 5.16 

 0.28 

 0.15 

 0.58 

 0.17 

 0.41 



IV 



118. 7 

 -10.5 



23.9 

 40.5 

 28.3 

 l-7> 

 0.70 

 6.40 

 0.38 

 0.15 

 0.40 

 0.22 

 0.37 



110.7 



23-4 

 47.0 

 22.6 

 7.0 

 0.48 

 5.80 

 0.66 

 0.08 

 0.48 

 0.16 

 0.32 



VI 



VII 



69.8 



41.0 



8.0 

 80.6 



8.7 



2.7 



O.II 



1.25 

 0.13 

 0.22 

 0.77 

 0.04 

 0.19 



99-7 

 27.1 

 23-4 

 550 

 14.9 

 6.7 

 0.27 

 4.60 

 0.26 

 0.16 



0.53 

 0.22 

 0.46 



VIII 



236.3 

 + 2.3 

 40.9 

 18.9 

 6.7 

 33-5 

 0.35 

 0.78 

 0.29 

 0.27 

 0.40 

 0.41 

 0.69 



