Eclogite from the California glaucophane schists

Abstract

One of the varied rock types making up the California glaucophane schists is true eclogite, corresponding to typical eclogite in mineral composition, chemical composition, texture, and specific gravity. The California glaucophane schists, and therefore the eclogite, were formed under conditions of moderate temperature and pressure, by hydrothermal contact metamorphism. The California eclogite is thus a mode of occurrence of this rock of a different type from those previously recognized by most writers.