...R. Baron 2 has been examined by Hatch,* who separates them into gneisses, granitite, olivine-norite, pyroxene-granulites, pyroxenites, and basalts. In...usual constituents of granulite. Among the basalts many varieties are described. In one variety, the augite and olivine, when present, are in porphyritic...

...olivine is enclosed in the plagioclase, and between it and the latter mineral is a reaction rim, composed of an inner zone of hypersthene, and an outer one of actinolite, including many small, green spinels. All the occurrences of the rock in Canada are briefly described,...

...composition, occur near St. John. Around the olivine crystals occur remarkably fine reaction rims, composed of an inner zone of hypersthene and an outer one of actinolite and spinel. The inner zone is considered original, the outer one secondary. The succession of Pre-Cambrian...