6S 



PKKCV ()1-i:nski. 



I"ij4. 26. Disintegrated phenocryst of olivine, caused by high temperature oxidation. The rim 



around the olivine crystal is hematite. Within the olivine the light grains are mineral components, 



formed by exsolution. < 150. Los Inocentes, Masafuera. Photo P. Ramdohr. 



Pig. 27. I'art of disintegrated olivine |)heno( ryst, enlarged x 600. Against the dark background 



of olivine the exsolution proiUn t is seen in the form of small composite grains consisting of 



hematite light and a darker undefined component. Larger lij^ht grains see PI. II, P^ig. I. 



Photo P. Ramdohr. 



