schist - greenschist - a facies of the Pelona Schist - display specimen and an "eye" identification can

and an "eye" identification can only take you close

Along its eastern edge the strata are almost vertical and form a wall locally called the Reef

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Amethyst quartz    SiO2

schist - greenschist - a facies of the Pelona Schist - display specimen and an "eye" identification canThis attractive dark green schist is mapped as a greenstone schist, has an uneven foliated parting, is composed of chlorite, epidote and albite feldspar. Schists vary greatly in composition and appearance. They are often derived from clays and muds and shales and fit into a metamorphic sequence of slate, phyllite, schist and gneiss in order of increasing metamorphosis. They can also be derived from fine grained igneous rocks. This schist, a unit of