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click to enlarge
Challenge them a bit to identify these by density and streak
and ancient shorelines can be seen far above the current lake suface
for scale
The pencil is 5
schist - greenschist - a facies of the Pelona Schist - display specimen click to enlargeThis 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
US$ 199.90
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