Fractured Serpentinite
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Fractured Serpentinite

by David Tanner, Leibniz Institute for Applied Geophysics (LIAG), Hannover, Germany

Regularly-spaced, anastomosing fractures in serpentinite. Sample from the Franciscan melange, Pacific coast of San Francisco. No wonder they fracture- serpentinization increases the volume of the rock by more than 30%!