AIUUIIDNAI, COMMKNTS ON IHK (IKOI.OC.Y OF IIIK JUAN KF.RNANDIZ ISLANDS 73 



F\g. 31. Masafuerite dike, x 9. Loberia \ieja, Masafuera. 



Fig. 32. Masafuerite dike, x 9. Analogous to sample Fig. 31 but with rims of iddingsite around 

 all phenocrysts of olivine. Loberia vieja, Masafuera. 



